{"id":4843,"date":"2016-06-09T11:28:56","date_gmt":"2016-06-09T11:28:56","guid":{"rendered":"http:\/\/bestkora.com\/IosDeveloper\/?p=4843"},"modified":"2017-03-30T06:01:17","modified_gmt":"2017-03-30T06:01:17","slug":"zadanie-2-cs193p-spring-2016-umnyj-kalkulyator-reshenie","status":"publish","type":"post","link":"https:\/\/bestkora.com\/IosDeveloper\/zadanie-2-cs193p-spring-2016-umnyj-kalkulyator-reshenie\/","title":{"rendered":"\u0417\u0430\u0434\u0430\u043d\u0438\u0435 2 cs193p Spring 2016 &#171;\u0423\u043c\u043d\u044b\u0439&#187; \u041a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440. \u0420\u0435\u0448\u0435\u043d\u0438\u0435. \u041e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u0438 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u043f\u0443\u043d\u043a\u0442\u044b."},"content":{"rendered":"<h2>\u0421\u043e\u0434\u0435\u0440\u0436\u0430\u043d\u0438\u0435<\/h2>\n<p>\u0422\u0435\u043a\u0441\u0442 \u0414\u043e\u043c\u0430\u0448\u043d\u0435\u0433\u043e \u0417\u0430\u0434\u0430\u043d\u0438\u044f 2 \u043d\u0430 \u0430\u043d\u0433\u043b\u0438\u0439\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435 \u0434\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043d\u0430\u00a0<span style=\"color: #373737;\">\u00a0<\/span><strong><a style=\"color: #1982d1;\" title=\"Developing iOS 7 Apps: Assignment 1\" href=\"https:\/\/itunes.apple.com\/us\/course\/developing-ios-9-apps-swift\/id1104579961\" target=\"_blank\">iTunes \u0432 \u043f\u0443\u043d\u043a\u0442\u0435 \u201cProgramming: Project 2: Calculator Brain\u2033<\/a><\/strong><span style=\"color: #373737;\">.\u00a0<\/span>\u041d\u0430 \u0440\u0443\u0441\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435 \u0432\u044b \u043c\u043e\u0436\u0435\u0442\u0435 \u0441\u043a\u0430\u0447\u0430\u0442\u044c \u0437\u0434\u0435\u0441\u044c:<strong><p><span class=\"gdm-drivefile-embed\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ssl.gstatic.com\/docs\/doclist\/images\/icon_12_pdf_list.png\" width=\"16\" height=\"16\" \/> <a href=\"https:\/\/drive.google.com\/file\/d\/0B0jZOSo2e4NmZWF1Y1JMcURfNjg\/view?usp=drivesdk\" target=\"&quot;_blank&quot;\">\u0417\u0430\u0434\u0430\u043d\u0438\u0435 2 iOS 9.pdf<\/a><\/span><\/p><p><span class=\"gdm-drivefile-embed\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ssl.gstatic.com\/docs\/doclist\/images\/icon_12_pdf_list.png\" width=\"16\" height=\"16\" \/> <a href=\"https:\/\/drive.google.com\/file\/d\/0B0jZOSo2e4NmNTBNbGhvUndNYXc\/view?usp=drivesdk\" target=\"&quot;_blank&quot;\">\u0417\u0430\u0434\u0430\u043d\u0438\u0435 2 iOS 9.pdf<\/a><\/span><\/p><\/strong><\/p>\n<p><span style=\"font-weight: 400;\">\u0417\u0430\u0434\u0430\u043d\u0438\u0435 2 \u0440\u0430\u0441\u0448\u0438\u0440\u044f\u0435\u0442 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438\u00a0\u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440\u0430\u00a0<strong>Calculator<\/strong>\u00a0\u0438\u0437 \u0417\u0430\u0434\u0430\u043d\u0438\u044f 1, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044f \u0435\u043c\u0443 \u0432\u0432\u043e\u0434\u0438\u0442\u044c \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0435\u201d \u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0442\u044c \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044e\u00a0<strong>Undo<\/strong>. \u041a\u0440\u043e\u043c\u0435 \u0442\u043e\u0433\u043e, \u0432\u0430\u043c \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e \u0432\u043d\u0435\u0441\u0442\u0438 \u0432 \u043a\u043e\u0434\u00a0\u0432\u0441\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f, \u0441\u0434\u0435\u043b\u0430\u043d\u043d\u044b\u0435 \u043d\u0430 \u043b\u0435\u043a\u0446\u0438\u0438 3 (\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0443\u044e\u00a0<strong><span style=\"color: #0000ff;\">program<\/span><\/strong>\u00a0\u0442\u0438\u043f\u0430\u00a0<strong>Property List<\/strong>\u00a0\u0438 \u0430\u0442\u0440\u0438\u0431\u0443\u0442\u044b \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0434\u043e\u0441\u0442\u0443\u043f\u043e\u043c). \u00a0\u041a\u0440\u043e\u043c\u0435 \u0442\u043e\u0433\u043e, \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0432\u0441\u0435\u0445 \u0435\u0433\u043e \u043f\u0443\u043d\u043a\u0442\u043e\u0432 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442 \u0432\u0430\u043c \u043e\u0432\u043b\u0430\u0434\u0435\u0442\u044c \u043d\u0430\u0432\u044b\u043a\u0430\u043c\u0438 \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u0442\u0430\u043a\u0438\u043c\u0438 \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0447\u0435\u0441\u043a\u0438\u043c\u0438 \u043a\u043e\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0438\u044f\u043c\u0438 \u043a\u0430\u043a <strong><span style=\"color: #0000ff;\">enum<\/span><\/strong>, <strong><span style=\"color: #0000ff;\">Dictionary<\/span><\/strong>, <strong><span style=\"color: #0000ff;\">Array<\/span><\/strong>, \u043a\u043e\u0440\u0442\u0435\u0436\u0438, <strong><span style=\"color: #0000ff;\">Optional<\/span><\/strong>, <strong><span style=\"color: #0000ff;\">String<\/span><\/strong>, \u041d\u0430\u0431\u043b\u044e\u0434\u0430\u0442\u0435\u043b\u0438 \u0421\u0432\u043e\u0439\u0441\u0442\u0432.\u00a0<\/span><\/p>\n<p>\u041a\u043e\u0434 \u0417\u0430\u0434\u0430\u043d\u0438\u044f 2 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0432 \u0434\u0432\u0443\u0445 \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u0430\u0445:<\/p>\n<ol>\n<li>\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0430\u044f \u043a\u0430\u043a \u043e\u043f\u0435\u0440\u0430\u043d\u0434 &#8212; \u043d\u0430 <strong><a href=\"https:\/\/github.com\/BestKora\/Assignment-2-2016-Calculator\">Github<\/a>\u00a0<\/strong>\u0434\u043b\u044f<strong>\u00a0Xcode 7<\/strong>\u00a0\u0438<strong>\u00a0Swift 2.2<\/strong>.<\/li>\n<li>\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0430\u044f \u043a\u0430\u043a \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044f \u00a0&#8212; \u043d\u0430 <strong><a href=\"https:\/\/github.com\/BestKora\/Assignment-2-2016-Calculator-PerformOperation\">Github<\/a><\/strong>\u00a0\u0434\u043b\u044f<strong>\u00a0Xcode 7<\/strong>\u00a0\u0438<strong>\u00a0Swift 2.2<\/strong>.<\/li>\n<\/ol>\n<p>\u0415\u0441\u043b\u0438 \u0432\u044b \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u043b\u0438\u00a0<strong>Xcode 8<\/strong>, \u0442\u043e \u0434\u043b\u044f\u00a0<strong>Swift 2.3<\/strong>\u00a0\u043a\u043e\u0434\u00a0\u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f\u00a0\u043d\u0430\u00a0<a href=\"https:\/\/github.com\/BestKora\/Swift-2.3-Solution-Spring-2016\"><strong>Github<\/strong><\/a>, \u0430 \u0434\u043b\u044f\u00a0<strong>Swift 3<\/strong>\u00a0&#8212;\u00a0\u0442\u0430\u043a\u0436\u0435 \u043d\u0430<a href=\"https:\/\/github.com\/BestKora\/Swift-3-Solution-Spring-2016\">\u00a0<strong>Github<\/strong><\/a>.<\/p>\n<p>\u041d\u0438\u0436\u0435 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043e \u0440\u0435\u0448\u0435\u043d\u0438\u0435 \u0432\u0441\u0435\u0445 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u0438 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u043f\u0443\u043d\u043a\u0442\u043e\u0432 \u0417\u0430\u0434\u0430\u043d\u0438\u044f 2.<\/p>\n<p><!--more--><\/p>\n<h2>\u041f\u0443\u043d\u043a\u0442 1 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439<\/h2>\n<blockquote><p><span style=\"font-weight: 400;\">\u0412\u0441\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f, \u0441\u0434\u0435\u043b\u0430\u043d\u043d\u044b\u0435 \u0441 \u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440\u043e\u043c Calculator \u043d\u0430 \u043b\u0435\u043a\u0446\u0438\u0438, \u0434\u043e\u043b\u0436\u043d\u044b \u0431\u044b\u0442\u044c \u0432\u043d\u0435\u0441\u0435\u043d\u044b \u0432 \u043a\u043e\u0434 \u0432\u0430\u0448\u0435\u0433\u043e \u0417\u0430\u0434\u0430\u043d\u0438\u044f 1. \u042d\u0442\u043e \u0432\u043a\u043b\u044e\u0447\u0430\u0435\u0442 \u043a\u0430\u043a <\/span><span style=\"color: #0000ff;\"><b>var<\/b> <b>program<\/b><\/span><span style=\"font-weight: 400;\">, \u0442\u0430\u043a \u0438 \u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u0443\u044e \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0443 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 (access control) \u0432\u0441\u0435\u0445 \u043c\u0435\u0442\u043e\u0434\u043e\u0432 \u0438 \u0441\u0432\u043e\u0439\u0441\u0442\u0432. \u0421\u0434\u0435\u043b\u0430\u0439\u0442\u0435 \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u043d\u044b\u0439 <strong>Calculator<\/strong> \u043f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0438\u0440\u0443\u044e\u0449\u0438\u043c \u043f\u0440\u0435\u0436\u0434\u0435, \u0447\u0435\u043c \u0432\u044b \u043f\u0440\u0438\u0441\u0442\u0443\u043f\u0438\u0442\u0435 \u043a \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u043e\u0441\u0442\u0430\u043b\u044c\u043d\u044b\u0445 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u0437\u0430\u0434\u0430\u043d\u0438\u0439. \u0418, \u043a\u0430\u043a \u0438 \u0432 \u043f\u0440\u043e\u0448\u043b\u044b\u0439 \u0440\u0430\u0437, \u201c\u043f\u0435\u0447\u0430\u0442\u0430\u0439\u0442\u0435\u201d \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0432 \u043a\u043e\u0434\u0435, \u0430 \u043d\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0439\u0442\u0435 copy \/ paste.<\/span><\/p><\/blockquote>\n<p>\u0412\u0441\u0435 \u0443\u0436\u0435 \u0441\u0434\u0435\u043b\u0430\u043d\u043e \u0432 \u0417\u0430\u0434\u0430\u043d\u0438\u0438 1, \u043d\u043e \u0432 \u044d\u0442\u043e\u043c \u043f\u0443\u043d\u043a\u0442\u0435 \u044f \u043f\u0435\u0440\u0435\u0438\u043c\u0435\u043d\u0443\u044e \u043c\u043e\u0439 \u043a\u043b\u0430\u0441\u0441 <strong><span style=\"color: #0000ff;\">ViewController<\/span><\/strong> \u0432 <strong><span style=\"color: #0000ff;\">CalculatorViewController<\/span><\/strong>. \u042d\u0442\u043e \u043f\u0435\u0440\u0435\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0441\u043e\u0441\u0442\u043e\u0438\u0442 \u0438\u0437 3-\u0445 \u0448\u0430\u0433\u043e\u0432:<\/p>\n<ol>\n<li>\u043f\u0435\u0440\u0435\u0438\u043c\u0435\u043d\u043e\u0432\u044b\u0432\u0430\u0435\u043c \u043a\u043b\u0430\u0441\u0441\u00a0<strong><span style=\"color: #0000ff;\">ViewController<\/span><\/strong> \u0432 <strong><span style=\"color: #0000ff;\">CalculatorViewController<\/span><\/strong>.<\/li>\n<\/ol>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-5.36.32-PM.png\" rel=\"attachment wp-att-4847\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4847 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-5.36.32-PM.png\" alt=\"Screen Shot 2016-06-08 at 5.36.32 PM\" width=\"1060\" height=\"254\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-5.36.32-PM.png 1060w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-5.36.32-PM-300x72.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-5.36.32-PM-768x184.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-5.36.32-PM-1024x245.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-5.36.32-PM-500x120.png 500w\" sizes=\"auto, (max-width: 1060px) 100vw, 1060px\" \/><\/a><\/p>\n<p>2. \u00a0\u043f\u0435\u0440\u0435\u0438\u043c\u0435\u043d\u043e\u0432\u044b\u0432\u0430\u0435\u043c \u0444\u0430\u0439\u043b\u00a0<span style=\"text-decoration: underline;\"><em>ViewController<\/em><\/span>\u00a0\u0432\u00a0<em><span style=\"text-decoration: underline;\">CalculatorViewController<\/span><\/em>.<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-5.41.19-PM.png\" rel=\"attachment wp-att-4849\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4849 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-5.41.19-PM.png\" alt=\"Screen Shot 2016-06-08 at 5.41.19 PM\" width=\"804\" height=\"354\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-5.41.19-PM.png 804w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-5.41.19-PM-300x132.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-5.41.19-PM-768x338.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-5.41.19-PM-500x220.png 500w\" sizes=\"auto, (max-width: 804px) 100vw, 804px\" \/><\/a><\/p>\n<p>3. \u00a0\u0438\u0437\u043c\u0435\u043d\u044f\u0435\u043c \u043a\u043b\u0430\u0441\u0441, \u043f\u0440\u0438\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0439 \u043a \u044d\u043a\u0440\u0430\u043d\u043d\u043e\u043c\u0443 \u0444\u0440\u0430\u0433\u043c\u0435\u043d\u0442\u0443 \u043d\u0430 storyboard<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-5.44.08-PM.png\" rel=\"attachment wp-att-4850\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4850 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-5.44.08-PM.png\" alt=\"Screen Shot 2016-06-08 at 5.44.08 PM\" width=\"1920\" height=\"1354\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-5.44.08-PM.png 1920w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-5.44.08-PM-300x212.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-5.44.08-PM-768x542.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-5.44.08-PM-1024x722.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-5.44.08-PM-425x300.png 425w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/a><\/p>\n<h2>\u041f\u0443\u043d\u043a\u0442 2 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439<\/h2>\n<blockquote><p><span style=\"font-weight: 400;\">\u041d\u0438\u0447\u0435\u0433\u043e \u043d\u0435 \u043c\u0435\u043d\u044f\u0439\u0442\u0435 \u0432 non-private <strong> API<\/strong> \u0432 <strong><span style=\"color: #0000ff;\">CalculatorBrain<\/span><\/strong> \u0438 \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0430\u0439\u0442\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c <span style=\"color: #0000ff;\"><b>Dictionary&lt;String,Operation&gt;<\/b><\/span> \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0435\u0439 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u044b \u0434\u0430\u043d\u043d\u044b\u0445.<\/span><\/p><\/blockquote>\n<h2>\u041f\u0443\u043d\u043a\u0442 3 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439<\/h2>\n<blockquote>\n<h2><span style=\"font-weight: 400;\">\u0412\u0430\u0448 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u0441\u043a\u0438\u0439 \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441 (<strong>UI<\/strong>) \u0434\u043e\u043b\u0436\u0435\u043d \u0431\u044b\u0442\u044c \u0432\u0441\u0435\u0433\u0434\u0430 \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d \u0441 \u0432\u0430\u0448\u0435\u0439 \u041c\u043e\u0434\u0435\u043b\u044c\u044e (<strong><span style=\"color: #0000ff;\">CalculatorBrain<\/span><\/strong>). <\/span><\/h2>\n<\/blockquote>\n<p><span style=\"font-weight: 400;\">\u0412\u0441\u0435 \u044d\u0442\u0438 \u043f\u0443\u043d\u043a\u0442\u044b \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u044b \u0432 \u0417\u0430\u0434\u0430\u043d\u0438\u0438 1.<\/span><\/p>\n<h2>\u041f\u0443\u043d\u043a\u0442 4 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439<\/h2>\n<blockquote>\n<h2><span style=\"font-weight: 400;\">\u041d\u0430\u0434\u0435\u043b\u0438\u0442\u0435 \u0432\u0430\u0448 <strong><span style=\"color: #0000ff;\">CalculatorBrain<\/span><\/strong> \u00a0\u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u0441\u0442\u044c\u044e \u0432\u0432\u043e\u0434\u0438\u0442\u044c \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0435\u201d. \u0421\u0434\u0435\u043b\u0430\u0439\u0442\u0435 \u044d\u0442\u043e \u043f\u0443\u0442\u0435\u043c \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0435\u0433\u043e <strong>API<\/strong> \u0432 \u0432\u0430\u0448\u0435\u043c <strong><span style=\"color: #0000ff;\">CalculatorBrain<\/span><\/strong> &#8230;<\/span><\/h2>\n<h2><span style=\"color: #800080;\"><b>func <\/b><\/span><strong><span style=\"color: #0000ff;\">setOperand \u00a0(variableName: <\/span><\/strong><span style=\"color: #501178;\"><b>String<\/b><\/span><span style=\"font-weight: 400;\">)<\/span><\/h2>\n<h2><span style=\"color: #800080;\"><b>var<\/b><\/span><span style=\"font-weight: 400;\"><strong><span style=\"color: #0000ff;\"> variableValues:<\/span> <\/strong>\u00a0<\/span><span style=\"color: #501178;\"><b>Dictionary<\/b><span style=\"font-weight: 400;\">&lt;<\/span><b>String<\/b><span style=\"font-weight: 400;\">,<\/span> <b>Double<\/b><span style=\"font-weight: 400;\">&gt;<\/span><\/span><\/h2>\n<h2><span style=\"font-weight: 400;\">\u042d\u0442\u043e \u0434\u043e\u043b\u0436\u043d\u043e \u0434\u0435\u043b\u0430\u0442\u044c \u0442\u043e\u0447\u043d\u043e \u0442\u043e, \u0447\u0442\u043e \u0433\u043e\u0432\u043e\u0440\u044f\u0442 \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u044f: \u043f\u0435\u0440\u0432\u0430\u044f \u0444\u0443\u043d\u043a\u0446\u0438\u044f \u0434\u043e\u043b\u0436\u043d\u0430 \u0432\u0432\u043e\u0434\u0438\u0442\u044c \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0443\u044e\u201d \u043a\u0430\u043a \u043e\u043f\u0435\u0440\u0430\u043d\u0434 (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440,<span style=\"color: #0000ff;\"><b> setOperand(\u201cx\u201d)<\/b><\/span> \u0431\u0443\u0434\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0443\u044e \u0441 \u0438\u043c\u0435\u043d\u0435\u043c <strong><span style=\"color: #0000ff;\">\u0445<\/span><\/strong>), \u0430 \u0432\u0442\u043e\u0440\u0430\u044f \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0430\u044f \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e <strong><span style=\"color: #0000ff;\">CalculatorBrain<\/span><\/strong> <strong>API<\/strong> \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442\u044c \u043b\u044e\u0431\u043e\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u0434\u043b\u044f \u043b\u044e\u0431\u043e\u0439 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, <span style=\"color: #0000ff;\"><b>brain.variableValues [\u201cx\u201d] = 35.0<\/b><\/span>. \u0412\u0430\u0448 <strong><span style=\"color: #0000ff;\">CalculatorBrain<\/span><\/strong> \u0434\u043e\u043b\u0436\u0435\u043d \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0442\u044c \u043b\u044e\u0431\u043e\u0435 \u0447\u0438\u0441\u043b\u043e \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445. \u0412\u044b \u043c\u043e\u0436\u0435\u0442\u0435 \u043f\u0440\u0435\u0434\u043f\u043e\u043b\u0430\u0433\u0430\u0442\u044c,\u0447\u0442\u043e \u043d\u0438\u043a\u0430\u043a\u043e\u0435 \u0438\u043c\u044f \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 \u043d\u0435 \u0441\u043e\u0432\u043f\u0430\u0434\u0430\u0435\u0442 \u0441 \u0441\u0438\u043c\u0432\u043e\u043b\u043e\u043c \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438.<\/span><\/h2>\n<\/blockquote>\n<h2><span style=\"font-weight: 400;\">\u0412\u043d\u0430\u0447\u0430\u043b\u0435 \u0440\u0435\u0430\u043b\u0438\u0437\u0443\u0435\u043c \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0443\u044e \u043a\u0430\u043a \u043e\u043f\u0435\u0440\u0430\u043d\u0434, \u0447\u0442\u043e \u0438 \u0433\u043e\u0432\u043e\u0440\u0438\u0442 \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u043c\u0435\u0442\u043e\u0434\u0430\u00a0<\/span><\/h2>\n<h2><span style=\"color: #800080;\">func\u00a0<\/span><strong><span style=\"color: #0000ff;\">setOperand \u00a0(variableName:\u00a0<\/span><\/strong><span style=\"color: #501178;\">String<\/span><span style=\"font-weight: 400;\">)<\/span><\/h2>\n<p>\u0414\u043e\u0431\u0430\u0432\u043b\u044f\u0435\u043c \u0443\u043a\u0430\u0437\u0430\u043d\u043d\u044b\u0439 \u0432\u044b\u0448\u0435 <strong>API<\/strong> \u0432 \u043a\u043b\u0430\u0441\u0441 <strong><span style=\"color: #0000ff;\">CalculatorBrain<\/span><\/strong>.<br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-6.12.01-PM.png\" rel=\"attachment wp-att-4851\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4851 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-6.12.01-PM.png\" alt=\"Screen Shot 2016-06-08 at 6.12.01 PM\" width=\"1100\" height=\"178\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-6.12.01-PM.png 1100w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-6.12.01-PM-300x49.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-6.12.01-PM-768x124.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-6.12.01-PM-1024x166.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-6.12.01-PM-500x81.png 500w\" sizes=\"auto, (max-width: 1100px) 100vw, 1100px\" \/><\/a><br \/>\n<span style=\"font-weight: 400;\">\u0415\u0441\u043b\u0438 \u0441\u043b\u043e\u0432\u0430\u0440\u044c <span style=\"color: #0000ff;\"><b>variableValues<\/b><\/span> \u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f, \u0442\u043e <span style=\"color: #0000ff;\"><b>result<\/b><\/span> \u0434\u043e\u043b\u0436\u0435\u043d \u0438\u0437\u043c\u0435\u043d\u044f\u0442\u044c\u0441\u044f, \u043e\u0442\u0440\u0430\u0436\u0430\u044f \u043d\u043e\u0432\u044b\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u0434\u043b\u044f \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445\u201d. \u041f\u043e\u044d\u0442\u043e\u043c\u0443 \u043c\u044b \u043f\u0435\u0440\u0435\u0437\u0430\u043f\u0443\u0441\u043a\u0430\u0435\u043c \u043d\u0430\u0448\u0443 <strong><span style=\"color: #0000ff;\">program<\/span><\/strong>, \u0442\u043e \u0435\u0441\u0442\u044c \u043f\u0435\u0440\u0435\u0441\u0447\u0438\u0442\u044b\u0432\u0430\u0435\u043c \u0432\u0441\u0435, \u0447\u0442\u043e \u043c\u044b \u0432\u0432\u0435\u043b\u0438 \u0432 \u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440, \u043d\u043e \u0441 \u043d\u043e\u0432\u044b\u043c\u0438 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f\u043c\u0438 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445.<\/span><br \/>\n. \u00a0 . \u00a0 . \u00a0 . \u00a0 . \u00a0 . \u00a0 . \u00a0 . \u00a0. \u00a0 . \u00a0 . \u00a0 . \u00a0 . \u00a0 . \u00a0 .<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-6.13.44-PM.png\" rel=\"attachment wp-att-4852\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4852 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-6.13.44-PM.png\" alt=\"Screen Shot 2016-06-08 at 6.13.44 PM\" width=\"1102\" height=\"152\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-6.13.44-PM.png 1102w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-6.13.44-PM-300x41.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-6.13.44-PM-768x106.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-6.13.44-PM-1024x141.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-6.13.44-PM-500x69.png 500w\" sizes=\"auto, (max-width: 1102px) 100vw, 1102px\" \/><\/a><\/p>\n<p>\u0412\u044b \u0432\u0438\u0434\u0438\u0442\u0435, \u0447\u0442\u043e, \u0435\u0441\u043b\u0438 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 <strong><span style=\"color: #0000ff;\">variable<\/span><\/strong> \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u0432 \u0441\u043b\u043e\u0432\u0430\u0440\u0435<br \/>\n<strong><span style=\"color: #800080;\">var<\/span><\/strong><span style=\"font-weight: 400;\"><strong><span style=\"color: #0000ff;\">\u00a0variableValues:<\/span>\u00a0<\/strong>\u00a0<\/span><span style=\"color: #501178;\"><b>Dictionary<\/b><span style=\"font-weight: 400;\">&lt;<\/span><b>String<\/b><span style=\"font-weight: 400;\">,<\/span>\u00a0<b>Double<\/b><span style=\"font-weight: 400;\">&gt;,\u00a0<\/span><\/span>\u0442\u043e \u0431\u0435\u0440\u0435\u0442\u0441\u044f \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 <strong>0<\/strong>, \u043a\u0430\u043a \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u043e\u043f\u0435\u0440\u0430\u0442\u043e\u0440\u0430 <strong><span style=\"color: #0000ff;\">??<\/span><\/strong>.<br \/>\n<span style=\"font-weight: 400;\">\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 <strong><span style=\"color: #0000ff;\">var description <\/span><\/strong> \u0434\u043e\u043b\u0436\u043d\u043e \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0430\u0442\u044c \u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c \u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u043e \u0438 \u0434\u043e\u043b\u0436\u043d\u043e \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u0442\u044c \u0438\u043c\u044f \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439\u201d (\u0430 \u043d\u0435 \u0435\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435) \u0432\u0441\u044f\u043a\u0438\u0439 \u0440\u0430\u0437, \u043a\u043e\u0433\u0434\u0430 \u0435\u0435 \u0432\u0432\u043e\u0434\u044f\u0442. \u041f\u043e\u044d\u0442\u043e\u043c\u0443 \u00a0<\/span><br \/>\n<strong><span style=\"color: #0000ff;\">descriptionAccumulator = variable<\/span><\/strong><br \/>\n\u0421\u0432\u043e\u0439\u0441\u0442\u0432\u043e <span style=\"color: #0000ff;\"><b>var program<\/b><\/span>, \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u043d\u043e\u0435 \u043d\u0430 \u043b\u0435\u043a\u0446\u0438\u0438, \u0442\u0430\u043a\u0436\u0435 \u043d\u0443\u0436\u0434\u0430\u0435\u0442\u0441\u044f \u0432 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0438 \u0434\u043b\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0430\u043d\u0438\u044f \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445\u201d.<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-7.50.47-PM.png\" rel=\"attachment wp-att-4853\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4853 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-7.50.47-PM.png\" alt=\"Screen Shot 2016-06-08 at 7.50.47 PM\" width=\"1062\" height=\"648\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-7.50.47-PM.png 1062w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-7.50.47-PM-300x183.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-7.50.47-PM-768x469.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-7.50.47-PM-1024x625.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-7.50.47-PM-492x300.png 492w\" sizes=\"auto, (max-width: 1062px) 100vw, 1062px\" \/><\/a><\/p>\n<p>\u0412 \u043f\u043e\u0434\u0441\u043a\u0430\u0437\u043a\u0435 \u2116 1 \u0433\u043e\u0432\u043e\u0440\u0438\u0442\u0441\u044f, \u0447\u0442\u043e &#171;\u0414\u0430\u0436\u0435 \u0435\u0441\u043b\u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0438 <strong>API<\/strong> \u043a\u043b\u0430\u0441\u0441\u0430 <strong><span style=\"color: #0000ff;\">CalculatorBrain<\/span><\/strong> \u0432\u0432\u043e\u0434\u044f\u0442 \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0443\u044e\u201d \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u043c\u0435\u0442\u043e\u0434\u0430 \u0441 \u0438\u043c\u0435\u043d\u0435\u043c <strong><span style=\"color: #0000ff;\">setOperand<\/span><\/strong>, \u043d\u0435\u0442 \u043f\u0440\u0438\u0447\u0438\u043d, \u0447\u0442\u043e\u0431\u044b \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u044f\u044f \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445\u201d \u0432 \u043a\u043b\u0430\u0441\u0441\u0435 <strong><span style=\"color: #0000ff;\">CalculatorBrain<\/span><\/strong> \u043d\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043b\u0430 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430 \u201c\u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439\u201d, \u0447\u0442\u043e\u0431\u044b \u0437\u0430\u0441\u0442\u0430\u0432\u0438\u0442\u044c \u044d\u0442\u043e \u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c (\u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e, \u044d\u0442\u043e \u0445\u043e\u0440\u043e\u0448\u0430\u044f \u0438\u0434\u0435\u044f, \u0442\u0430\u043a \u043a\u0430\u043a \u0432\u043d\u0443\u0442\u0440\u0438 \u043a\u043b\u0430\u0441\u0441\u0430 <strong><span style=\"color: #0000ff;\">CalculatorBrain<\/span><\/strong> \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u0431\u043e\u043b\u044c\u0448\u0430\u044f \u0438\u043d\u0444\u0440\u0430\u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0430 \u0434\u043b\u044f \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044f\u043c\u0438).&#187; \u041c\u044b \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0438\u043c \u044d\u0442\u043e\u0442 \u0432\u0430\u0440\u0438\u0430\u043d\u0442 \u043f\u043e\u0437\u0436\u0435 \u0438 \u044d\u0442\u043e \u0431\u0443\u0434\u0435\u0442 \u0441\u043e\u0432\u0441\u0435\u043c \u0434\u0440\u0443\u0433\u043e\u0435 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0435. \u0410 \u043f\u043e\u043a\u0430 \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0438\u043c \u0432\u0430\u0440\u0438\u0430\u043d\u0442 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0417\u0430\u0434\u0430\u043d\u0438\u044f, \u043a\u043e\u0433\u0434\u0430 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0430\u044f \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043a\u0430\u043a \u043e\u043f\u0435\u0440\u0430\u043d\u0434.<br \/>\n\u041a\u043e\u0434 \u043c\u043e\u0436\u043d\u043e \u043f\u043e\u0441\u043c\u043e\u0442\u0440\u0435\u0442\u044c \u043d\u0430\u00a0<strong><a href=\"https:\/\/github.com\/BestKora\/Assignment-2-2016-Calculator\">Github<\/a>\u00a0<\/strong>\u0434\u043b\u044f<strong>\u00a0Xcode 7<\/strong>\u00a0\u0438<strong>\u00a0Swift 2.2<\/strong>.<\/p>\n<p>\u0415\u0441\u043b\u0438 \u0432\u044b \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u043b\u0438\u00a0<strong>Xcode 8<\/strong>, \u0442\u043e \u0434\u043b\u044f\u00a0<strong>Swift 2.3<\/strong>\u00a0\u043a\u043e\u0434\u00a0\u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f\u00a0\u043d\u0430\u00a0<a href=\"https:\/\/github.com\/BestKora\/Swift-2.3-Solution-Spring-2016\"><strong>Github<\/strong><\/a>, \u0430 \u0434\u043b\u044f\u00a0<strong>Swift 3<\/strong>\u00a0&#8212;\u00a0\u0442\u0430\u043a\u0436\u0435 \u043d\u0430<a href=\"https:\/\/github.com\/BestKora\/Swift-3-Solution-Spring-2016\">\u00a0<strong>Github<\/strong><\/a>.<\/p>\n<h2>\u041f\u0443\u043d\u043a\u0442 5 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439<\/h2>\n<blockquote><p><span style=\"font-weight: 400;\">\u0420\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 <span style=\"color: #0000ff;\"><b>var result<\/b><\/span> \u0434\u043e\u043b\u0436\u0435\u043d \u0442\u0435\u043f\u0435\u0440\u044c \u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u043e \u043e\u0442\u0440\u0430\u0436\u0430\u0442\u044c \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445\u201d (\u0438\u0437 \u0441\u043b\u043e\u0432\u0430\u0440\u044f <span style=\"color: #0000ff;\"><b>variableValues<\/b><\/span>) \u0432\u0441\u044f\u043a\u0438\u0439 \u0440\u0430\u0437, \u043a\u043e\u0433\u0434\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0442\u0441\u044f \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0435\u201d (\u043a\u0430\u043a \u0432 \u043f\u0440\u043e\u0448\u043b\u043e\u043c, \u0442\u0430\u043a \u0438 \u0432 \u0431\u0443\u0434\u0443\u0449\u0435\u043c, \u0441\u043c. 8e \u043d\u0438\u0436\u0435). \u0415\u0441\u043b\u0438 \u0443 \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439\u201d \u043d\u0435\u0442 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u0432 \u0441\u043b\u043e\u0432\u0430\u0440\u0435, \u0442\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0439\u0442\u0435 <b>0.0<\/b> \u043a\u0430\u043a \u0435\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435. \u0415\u0441\u043b\u0438 \u0441\u043b\u043e\u0432\u0430\u0440\u044c <span style=\"color: #0000ff;\"><b>variableValues<\/b><\/span> \u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f, \u0442\u043e <span style=\"color: #0000ff;\"><b>result<\/b><\/span> \u0434\u043e\u043b\u0436\u0435\u043d \u0438\u0437\u043c\u0435\u043d\u044f\u0442\u044c\u0441\u044f, \u043e\u0442\u0440\u0430\u0436\u0430\u044f \u043d\u043e\u0432\u044b\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u0434\u043b\u044f \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445\u201d.<\/span><\/p><\/blockquote>\n<p>\u0420\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u043c\u043e\u0436\u043d\u043e \u043f\u043e\u0441\u043c\u043e\u0442\u0440\u0435\u0442\u044c \u0432 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u043c \u043f\u0443\u043d\u043a\u0442\u0435 4.<\/p>\n<h2>\u041f\u0443\u043d\u043a\u0442 6 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439<\/h2>\n<blockquote><p><span style=\"font-weight: 400;\">\u0412\u0430\u0448\u0435 \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 <strong><span style=\"color: #0000ff;\">var description<\/span><\/strong> \u0434\u043e\u043b\u0436\u043d\u043e \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0430\u0442\u044c \u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c \u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u043e \u0438 \u0434\u043e\u043b\u0436\u043d\u043e \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u0442\u044c \u0438\u043c\u044f \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439\u201d (\u0430 \u043d\u0435 \u0435\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435) \u0432\u0441\u044f\u043a\u0438\u0439 \u0440\u0430\u0437, \u043a\u043e\u0433\u0434\u0430 \u0435\u0435 \u0432\u0432\u043e\u0434\u044f\u0442.<\/span><\/p><\/blockquote>\n<p><span style=\"font-weight: 400;\">\u0420\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u043c\u043e\u0436\u043d\u043e \u043f\u043e\u0441\u043c\u043e\u0442\u0440\u0435\u0442\u044c \u0432 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u043c \u043f\u0443\u043d\u043a\u0442\u0435 4.<\/span><\/p>\n<h2>\u041f\u0443\u043d\u043a\u0442 7 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439<\/h2>\n<blockquote><p><span style=\"font-weight: 400;\">\u0421\u0432\u043e\u0439\u0441\u0442\u0432\u043e<span style=\"color: #0000ff;\"> <b>var program<\/b><\/span>, \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u043d\u043e\u0435 \u043d\u0430 \u043b\u0435\u043a\u0446\u0438\u0438, \u0442\u0430\u043a\u0436\u0435 \u043d\u0443\u0436\u0434\u0430\u0435\u0442\u0441\u044f \u0432 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0438 \u0434\u043b\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0430\u043d\u0438\u044f \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445\u201d.<\/span><\/p><\/blockquote>\n<p>\u0420\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u043c\u043e\u0436\u043d\u043e \u043f\u043e\u0441\u043c\u043e\u0442\u0440\u0435\u0442\u044c \u0432 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u043c \u043f\u0443\u043d\u043a\u0442\u0435 4.<br \/>\n\u041a\u043e\u0434 \u043c\u043e\u0436\u043d\u043e \u043f\u043e\u0441\u043c\u043e\u0442\u0440\u0435\u0442\u044c \u043d\u0430\u00a0<strong><a href=\"https:\/\/github.com\/BestKora\/Assignment-2-2016-Calculator\">Github<\/a>\u00a0<\/strong>\u0434\u043b\u044f<strong>\u00a0Xcode 7<\/strong>\u00a0\u0438<strong>\u00a0Swift 2.2<\/strong>.<\/p>\n<p>\u0415\u0441\u043b\u0438 \u0432\u044b \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u043b\u0438\u00a0<strong>Xcode 8<\/strong>, \u0442\u043e \u0434\u043b\u044f\u00a0<strong>Swift 2.3<\/strong>\u00a0\u043a\u043e\u0434\u00a0\u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f\u00a0\u043d\u0430\u00a0<a href=\"https:\/\/github.com\/BestKora\/Swift-2.3-Solution-Spring-2016\"><strong>Github<\/strong><\/a>, \u0430 \u0434\u043b\u044f\u00a0<strong>Swift 3<\/strong>\u00a0&#8212;\u00a0\u0442\u0430\u043a\u0436\u0435 \u043d\u0430<a href=\"https:\/\/github.com\/BestKora\/Swift-3-Solution-Spring-2016\">\u00a0<strong>Github<\/strong><\/a>.<\/p>\n<h2>\u041f\u0443\u043d\u043a\u0442 8 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439<\/h2>\n<blockquote>\n<ol>\n<li style=\"font-weight: 400;\">\u0414\u043e\u0431\u0430\u0432\u044c\u0442\u0435 \u0434\u0432\u0435 \u043d\u043e\u0432\u044b\u0445 \u043a\u043d\u043e\u043f\u043a\u0438 \u043d\u0430 UI \u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440\u0430 Calculator:<b>\u2192M<\/b> \u0438 <b>M<\/b>. \u041d\u0435 \u043f\u0440\u0438\u043d\u043e\u0441\u0438\u0442\u0435 \u0432 \u0436\u0435\u0440\u0442\u0432\u0443 \u043d\u0438\u043a\u0430\u043a\u0438\u0435 \u043a\u043d\u043e\u043f\u043a\u0438 \u0441 \u0442\u0440\u0435\u0431\u0443\u0435\u043c\u044b\u043c\u0438 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044f\u043c\u0438 \u0438\u0437 \u0417\u0430\u0434\u0430\u043d\u0438\u044f 1 (\u0445\u043e\u0442\u044f \u0432\u044b \u043c\u043e\u0436\u0435\u0442\u0435 \u0434\u043e\u0431\u0430\u0432\u0438\u0442\u044c \u0431\u043e\u043b\u044c\u0448\u0435 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439, \u0435\u0441\u043b\u0438 \u0445\u043e\u0442\u0438\u0442\u0435). \u042d\u0442\u0438 \u0434\u0432\u0435 \u043a\u043d\u043e\u043f\u043a\u0438 \u0431\u0443\u0434\u0443\u0442 \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0435\u043d\u043d\u043e \u0443\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u0442\u044c \u0438 \u043f\u043e\u043b\u0443\u0447\u0430\u0442\u044c \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0443\u044e \u0432 <strong><span style=\"color: #0000ff;\">CalculatorBrain<\/span><\/strong>, \u043d\u0430\u0437\u044b\u0432\u0430\u0435\u043c\u0443\u044e <span style=\"color: #0000ff;\"><b>M<\/b><\/span>.<\/li>\n<\/ol>\n<ul>\n<li style=\"font-weight: 400;\"><b>\u2192M<\/b>\u00a0\u0443\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u0435\u0442 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 <span style=\"color: #0000ff;\"><b> M<\/b><\/span> \u0432 <span style=\"color: #0000ff;\"><b>brain<\/b><\/span> \u0432 \u0442\u0435\u043a\u0443\u0449\u0435\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u043d\u0430 <span style=\"color: #0000ff;\"><b>display<\/b><\/span> \u0438 \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u0435\u0442 \u043d\u0430 <span style=\"color: #0000ff;\"><b>display<\/b><\/span> \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 <span style=\"color: #0000ff;\"><b>result<\/b><\/span>, \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u043d\u044b\u0439 \u0438\u0437 <span style=\"color: #0000ff;\"><b>brain<\/b><\/span>.<\/li>\n<li style=\"font-weight: 400;\"><b>\u2192M<\/b> \u043d\u0435 \u0434\u043e\u043b\u0436\u043d\u0430 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0442\u044c <span style=\"color: #0000ff;\"><b>setOperand<\/b><\/span>.<\/li>\n<li style=\"font-weight: 400;\">\u041d\u0430\u0436\u0430\u0442\u0438\u0435 <b>M<\/b> \u0434\u043e\u043b\u0436\u043d\u043e <span style=\"color: #0000ff;\"><b>setOperand(\u201cM\u201d)<\/b><\/span> \u0432 <span style=\"color: #0000ff;\"><b>brain<\/b><\/span> \u0438 \u0437\u0430\u0442\u0435\u043c \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u0442\u044c \u043d\u0430 <span style=\"color: #0000ff;\"><b>display<\/b><\/span> \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 <span style=\"color: #0000ff;\"><b>result<\/b><\/span>, \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u043d\u044b\u0439 \u0438\u0437 <span style=\"color: #0000ff;\"><b>brain<\/b><\/span>.<\/li>\n<li style=\"font-weight: 400;\"><b>\u2192M<\/b> \u0438 <b>M<\/b> \u044f\u0432\u043b\u044f\u044e\u0442\u0441\u044f \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u043e\u043c <b>C<\/b>ontroller, \u0430 \u043d\u0435 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u043e\u043c <b>M<\/b>odel (\u0445\u043e\u0442\u044f \u043e\u043d\u0438 \u043e\u0431\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0442 \u043a\u043e\u043d\u0446\u0435\u043f\u0446\u0438\u044e \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445\u201d \u0432 <b>M<\/b>odel).<\/li>\n<li style=\"font-weight: 400;\">\u042d\u0442\u043e \u043d\u0435 \u0432\u044b\u0434\u0430\u044e\u0449\u0430\u044f\u0441\u044f \u043a\u043d\u043e\u043f\u043a\u0430 \u201cmemory\u201d \u043d\u0430 \u043d\u0430\u0448\u0435\u043c \u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440\u0435, \u043d\u043e \u043e\u043d\u0430 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0445\u043e\u0440\u043e\u0448\u0438\u043c \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u043e\u043c \u0434\u043b\u044f \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f, \u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u043e \u043b\u0438 \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442 \u043a\u043e\u043d\u0446\u0435\u043f\u0446\u0438\u044f \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445\u201d, \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u0430\u044f \u0432\u044b\u0448\u0435.<\/li>\n<li style=\"font-weight: 400;\">\u041f\u0440\u0438\u043c\u0435\u0440\u044b \u2026<\/li>\n<li style=\"font-weight: 400;\"><span style=\"color: #5479e8;\"><b>9 + \u00a0M = \u221a<\/b> <\/span><span style=\"font-weight: 400;\">\u21d2 <\/span><span style=\"color: #0000ff;\"><b>description<\/b><\/span> \u0438\u043c\u0435\u0435\u0442 \u0432\u0438\u0434 <span style=\"color: #ff6600;\"><b>\u221a<\/b><b>(9+M)<\/b><\/span>, <span style=\"color: #0000ff;\"><b>display<\/b><\/span> \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u0435\u0442 3, \u0442\u0430\u043a \u043a\u0430\u043a <span style=\"color: #0000ff;\"><b>M<\/b><\/span> \u043d\u0435 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0430 (\u0442\u043e \u0435\u0441\u0442\u044c \u0440\u0430\u0432\u043d\u0430 0)<\/li>\n<li style=\"font-weight: 400;\"><span style=\"color: #5479e8;\"><b>7 \u2192M<\/b><\/span> \u21d2 <span style=\"color: #0000ff;\"><b>display<\/b><\/span> \u0442\u0435\u043f\u0435\u0440\u044c \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u0435\u0442 4 (\u043a\u0432\u0430\u0434\u0440\u0430\u0442\u043d\u044b\u0439 \u043a\u043e\u0440\u0435\u043d\u044c 16), <span style=\"color: #0000ff;\"><b>description<\/b><\/span> \u0432\u0441\u0435 \u0435\u0449\u0435 \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u0435\u0442 <span style=\"color: #ff6600;\"><b>\u221a<\/b><b>(9+M)<\/b><\/span><\/li>\n<li style=\"font-weight: 400;\"><b><span style=\"color: #5479e8;\">+14<\/span> \u00a0=<\/b>\u21d2 <span style=\"color: #0000ff;\"><b>display<\/b><\/span> \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u0435\u0442 18, <span style=\"color: #0000ff;\"><b>description<\/b><\/span> \u0442\u0435\u043f\u0435\u0440\u044c <span style=\"color: #ff6600;\"><b>\u221a<\/b><b>(9+M)+14<\/b><\/span><\/li>\n<\/ul>\n<\/blockquote>\n<p>\u0420\u0430\u0441\u043f\u043e\u043b\u0430\u0433\u0430\u0435\u043c \u043d\u0430\u00a0<strong>storyboard<\/strong>\u00a0\u00a0\u043a\u043d\u043e\u043f\u043a\u0438\u00a0<b>\u2192M<\/b>\u00a0 \u0438\u00a0<b>M<\/b>\u00a0\u0438 \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e\u00a0<strong>CTRL<\/strong>-\u043f\u0435\u0440\u0435\u0442\u044f\u0433\u0438\u0432\u0430\u043d\u0438\u044f \u0441\u043e\u0437\u0434\u0430\u0435\u043c \u0434\u043b\u044f \u043d\u0438\u0445\u00a0<strong><span style=\"color: #993366;\">@IBAction<\/span><\/strong>\u00a0\u0444\u0443\u043d\u043a\u0446\u0438\u0438\u00a0<strong><span style=\"color: #0000ff;\">setM<\/span><\/strong>\u00a0\u0438\u00a0<span style=\"color: #0000ff;\"><b>pushM<\/b><\/span><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.48.17-PM.png\" rel=\"attachment wp-att-4854\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4854 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.48.17-PM.png\" alt=\"Screen Shot 2016-06-08 at 9.48.17 PM\" width=\"1958\" height=\"1092\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.48.17-PM.png 1958w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.48.17-PM-300x167.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.48.17-PM-768x428.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.48.17-PM-1024x571.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.48.17-PM-500x279.png 500w\" sizes=\"auto, (max-width: 1958px) 100vw, 1958px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.48.45-PM.png\" rel=\"attachment wp-att-4855\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4855 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.48.45-PM.png\" alt=\"Screen Shot 2016-06-08 at 9.48.45 PM\" width=\"1914\" height=\"1138\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.48.45-PM.png 1914w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.48.45-PM-300x178.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.48.45-PM-768x457.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.48.45-PM-1024x609.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.48.45-PM-500x297.png 500w\" sizes=\"auto, (max-width: 1914px) 100vw, 1914px\" \/><\/a><\/p>\n<p>\u0425\u043e\u0442\u044f \u043c\u0435\u0442\u043e\u0434\u044b <strong><span style=\"color: #993366;\">@IBAction<\/span><\/strong>\u00a0\u0432 \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u0438 \u043e\u0440\u0438\u0435\u043d\u0442\u0438\u0440\u0443\u044e\u0442\u0441\u044f \u043d\u0430 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0443\u044e<strong><span style=\"color: #0000ff;\"> M<\/span><\/strong>, \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f \u043c\u0435\u0442\u043e\u0434\u043e\u0432 \u00a0<strong><span style=\"color: #0000ff;\">setM<\/span><\/strong>\u00a0\u0438\u00a0<b><span style=\"color: #0000ff;\">pushM<\/span><\/b> \u043f\u0440\u0435\u0434\u043f\u043e\u043b\u0430\u0433\u0430\u0435\u0442 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u0443\u044e \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0443\u044e, \u043a\u043e\u0442\u043e\u0440\u0443\u044e \u043c\u044b \u0447\u0438\u0442\u0430\u0435\u043c \u0441 \u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043a\u0430 \u043a\u043d\u043e\u043f\u043a\u0438:<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.57.51-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4856 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.57.51-PM.png\" alt=\"\" width=\"1076\" height=\"378\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.57.51-PM.png 1076w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.57.51-PM-300x105.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.57.51-PM-768x270.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.57.51-PM-1024x360.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-9.57.51-PM-500x176.png 500w\" sizes=\"auto, (max-width: 1076px) 100vw, 1076px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>\u041f\u0440\u043e\u0432\u0435\u0440\u044f\u0435\u043c \u0440\u0430\u0431\u043e\u0442\u043e\u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u0441\u0442\u044c \u043d\u0430 \u043f\u0440\u0438\u043c\u0435\u0440\u0430\u0445, \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0445 \u0432 \u0437\u0430\u0434\u0430\u043d\u0438\u0438.<br \/>\n\u041a\u043e\u0434 \u043c\u043e\u0436\u043d\u043e \u043f\u043e\u0441\u043c\u043e\u0442\u0440\u0435\u0442\u044c \u043d\u0430\u00a0<strong><a href=\"https:\/\/github.com\/BestKora\/Assignment-2-2016-Calculator\">Github<\/a>\u00a0<\/strong>\u0434\u043b\u044f<strong>\u00a0Xcode 7<\/strong>\u00a0\u0438<strong>\u00a0Swift 2.2<\/strong>.<\/p>\n<p>\u0415\u0441\u043b\u0438 \u0432\u044b \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u043b\u0438\u00a0<strong>Xcode 8<\/strong>, \u0442\u043e \u0434\u043b\u044f\u00a0<strong>Swift 2.3<\/strong>\u00a0\u043a\u043e\u0434\u00a0\u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f\u00a0\u043d\u0430\u00a0<a href=\"https:\/\/github.com\/BestKora\/Swift-2.3-Solution-Spring-2016\"><strong>Github<\/strong><\/a>, \u0430 \u0434\u043b\u044f\u00a0<strong>Swift 3<\/strong>\u00a0&#8212;\u00a0\u0442\u0430\u043a\u0436\u0435 \u043d\u0430<a href=\"https:\/\/github.com\/BestKora\/Swift-3-Solution-Spring-2016\">\u00a0<strong>Github<\/strong><\/a>.<\/p>\n<h2>\u041f\u0443\u043d\u043a\u0442 9 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439<\/h2>\n<blockquote><p><span style=\"font-weight: 400;\">\u0423\u0431\u0435\u0434\u0438\u0442\u0435\u0441\u044c, \u0447\u0442\u043e \u043a\u043d\u043e\u043f\u043a\u0430 \u00a0<b>\u0421<\/b> \u0432\u0430\u0448\u0435\u0433\u043e \u0417\u0430\u0434\u0430\u043d\u0438\u044f 1 \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442 \u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u043e \u0432 \u044d\u0442\u043e\u043c \u0437\u0430\u0434\u0430\u043d\u0438\u0438. \u0412 \u0434\u043e\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u043e\u043d\u0430 \u0434\u043e\u043b\u0436\u043d\u0430 \u0443\u0431\u0438\u0440\u0430\u0442\u044c \u043b\u044e\u0431\u044b\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439\u201d <span style=\"color: #0000ff;\"><b>M<\/b><\/span> \u0438\u0437 <span style=\"color: #0000ff;\"><b>variableValues <\/b><b>Dictionary<\/b><\/span> \u0432 <strong><span style=\"color: #0000ff;\">CalculatorBrain<\/span><\/strong> ( \u0430 \u043d\u0435 \u0443\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u0442\u044c \u0432<strong> 0<\/strong> \u0438\u043b\u0438 \u043a\u0430\u043a\u043e\u0435-\u0442\u043e \u0434\u0440\u0443\u0433\u043e\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435). \u042d\u0442\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442 \u0432\u0430\u043c \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0441\u043b\u0443\u0447\u0430\u0439 \u201c\u043d\u0435\u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u043d\u043e\u0439\u201d \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439.<\/span><\/p><\/blockquote>\n<p>\u0414\u043b\u044f \u043f\u0440\u0438\u0434\u0430\u043d\u0438\u044f \u0433\u0438\u0431\u043a\u043e\u0441\u0442\u0438\u00a0<strong>API<\/strong>\u00a0\u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440\u0443 &#8212; \u043a\u0430\u043a \u043d\u0430\u043c \u0441\u043e\u0432\u0435\u0442\u043e\u0432\u0430\u043b\u0438 \u0432 \u043f\u043e\u0434\u0441\u043a\u0430\u0437\u043a\u0430\u0445 &#8212; \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u0435\u043c \u0432<strong>\u00a0<span style=\"color: #0000ff;\">CalculatorBrain<\/span><\/strong>\u00a0\u0435\u0449\u0435 \u0434\u0432\u0430\u00a0<strong>non-private<\/strong>\u00a0\u043c\u0435\u0442\u043e\u0434\u0430\u00a0<span style=\"color: #0000ff;\"><strong>clear\u00a0<\/strong><\/span> \u0438 <strong><span style=\"color: #0000ff;\">\u00a0clearVariable<\/span><\/strong><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-1.35.04-PM.png\" rel=\"attachment wp-att-4859\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4859 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-1.35.04-PM.png\" alt=\"Screen Shot 2016-06-09 at 1.35.04 PM\" width=\"1060\" height=\"306\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-1.35.04-PM.png 1060w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-1.35.04-PM-300x87.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-1.35.04-PM-768x222.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-1.35.04-PM-1024x296.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-1.35.04-PM-1000x288.png 1000w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-1.35.04-PM-500x144.png 500w\" sizes=\"auto, (max-width: 1060px) 100vw, 1060px\" \/><\/a><\/p>\n<p>\u0425\u043e\u0447\u0443 \u043e\u0442\u043c\u0435\u0442\u0438\u0442\u044c, \u0447\u0442\u043e \u043c\u0435\u0442\u043e\u0434 \u00a0<strong><span style=\"color: #0000ff;\">removeAll()<\/span><\/strong> \u0438\u043c\u0435\u0435\u0442 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u00a0<strong><span style=\"color: #0000ff;\">keepCapacity<\/span><\/strong>, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0438\u043c\u0435\u0435\u0442 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 <strong><span style=\"color: #0000ff;\">true<\/span><\/strong> \u0438 \u043e\u0437\u043d\u0430\u0447\u0430\u0435\u0442 \u0441\u043e\u0445\u0440\u0430\u043d\u0435\u043d\u0438\u0435 \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u043f\u0430\u043c\u044f\u0442\u0438, \u043a\u043e\u0442\u043e\u0440\u0443\u044e \u0437\u0430\u043d\u0438\u043c\u0430\u043b \u043c\u0430\u0441\u0441\u0438\u0432. \u041d\u0430\u043c \u0436\u0435 \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u043d\u0443\u0436\u043d\u043e, \u0447\u0442\u043e\u0431\u044b \u043c\u0430\u0441\u0441\u0438\u0432 &#171;\u0443\u0448\u0435\u043b&#187; \u0438\u0437 &#171;\u043a\u0443\u0447\u0438&#187;, \u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u043e \u0432 \u043d\u0430\u0448\u0435\u043c \u0441\u043b\u0443\u0447\u0430\u0435\u00a0<strong><span style=\"color: #0000ff;\">keepCapacity: false<\/span><\/strong>. \u042d\u0442\u043e \u044d\u043a\u0432\u0438\u0432\u0430\u043b\u0435\u043d\u0442\u043d\u043e \u043a\u043e\u0434\u0443<br \/>\n<strong><span style=\"color: #0000ff;\">internalProgram = []<\/span><\/strong><br \/>\n\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c \u043e\u0431\u0435 \u044d\u0442\u0438\u0445 \u0444\u0443\u043d\u043a\u0446\u0438\u0439 \u0432 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043a\u043d\u043e\u043f\u043a\u0438 <strong>\u0421<\/strong>:<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-10.25.21-PM.png\" rel=\"attachment wp-att-4858\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4858 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-10.25.21-PM.png\" alt=\"Screen Shot 2016-06-08 at 10.25.21 PM\" width=\"1752\" height=\"590\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-10.25.21-PM.png 1752w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-10.25.21-PM-300x101.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-10.25.21-PM-768x259.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-10.25.21-PM-1024x345.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-08-at-10.25.21-PM-500x168.png 500w\" sizes=\"auto, (max-width: 1752px) 100vw, 1752px\" \/><\/a><\/p>\n<p>\u0412\u043e\u0442 \u043a\u0430\u043a \u0432\u044b\u0433\u043b\u044f\u0434\u0438\u0442 <strong>Action <span style=\"color: #0000ff;\">ClearAll<\/span><\/strong>:<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-1.53.42-PM.png\" rel=\"attachment wp-att-4860\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4860 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-1.53.42-PM.png\" alt=\"Screen Shot 2016-06-09 at 1.53.42 PM\" width=\"1068\" height=\"164\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-1.53.42-PM.png 1068w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-1.53.42-PM-300x46.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-1.53.42-PM-768x118.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-1.53.42-PM-1024x157.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-1.53.42-PM-500x77.png 500w\" sizes=\"auto, (max-width: 1068px) 100vw, 1068px\" \/><\/a><\/p>\n<h2>\u041f\u0443\u043d\u043a\u0442 10 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439<\/h2>\n<blockquote><p><span style=\"font-weight: 400;\">\u0414\u043e\u0431\u0430\u0432\u044c\u0442\u0435 \u201c<strong>Undo<\/strong>\u201d \u043a \u0432\u0430\u0448\u0435\u043c\u0443 \u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440\u0443: \u0432 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u043c \u043f\u0443\u043d\u043a\u0442\u0435 \u0417\u0430\u0434\u0430\u043d\u0438\u044f 1 \u0432\u044b \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u043b\u0438 \u00a0\u043a\u043d\u043e\u043f\u043a\u0443 \u00a0\u201c<strong>backspace<\/strong>\u201d, \u0435\u0441\u043b\u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u0432\u0432\u0435\u043b \u043d\u0435\u0432\u0435\u0440\u043d\u0443\u044e \u0446\u0438\u0444\u0440\u0443. \u0422\u0435\u043f\u0435\u0440\u044c \u043c\u044b \u0433\u043e\u0432\u043e\u0440\u0438\u043c \u043e \u043a\u043e\u043c\u0431\u0438\u043d\u0430\u0446\u0438\u0438 \u201c<strong>backspace<\/strong>\u201d \u0438 \u0440\u0435\u0430\u043b\u044c\u043d\u043e\u0433\u043e \u201c<strong>Undo<\/strong>\u201d \u0432 \u0435\u0434\u0438\u043d\u043e\u0439 \u043a\u043d\u043e\u043f\u043a\u0435. \u0415\u0441\u043b\u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f \u0432 \u0441\u0435\u0440\u0435\u0434\u0438\u043d\u0435 \u0432\u0432\u043e\u0434\u0430 \u0447\u0438\u0441\u043b\u0430, \u0442\u043e \u044d\u0442\u043e \u043a\u043d\u043e\u043f\u043a\u0430 \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442 \u043a\u0430\u043a \u00a0<strong>backspace<\/strong>. \u0415\u0441\u043b\u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u043d\u0435 \u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f \u00a0\u0432 \u0441\u0435\u0440\u0435\u0434\u0438\u043d\u0435 \u0432\u0432\u043e\u0434\u0430 \u0447\u0438\u0441\u043b\u0430, \u0442\u043e \u0434\u043e\u043b\u0436\u043d\u043e \u0441\u0434\u0435\u043b\u0430\u0442\u044c\u00a0<strong>Undo<\/strong> \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0439 \u0432\u0435\u0449\u0438, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0431\u044b\u043b\u0430 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0430 \u0432 <span style=\"color: #0000ff;\"><b>CalculatorBrain<\/b><\/span>. \u00a0\u041d\u0435 \u043e\u0442\u043c\u0435\u043d\u044f\u0439\u0442\u0435 \u0437\u0430\u043f\u043e\u043c\u0438\u043d\u0430\u043d\u0438\u044f \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0439 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 (\u043d\u043e \u0414\u0415\u041b\u0410\u0419\u0422\u0415 \u043e\u0442\u043c\u0435\u043d\u0443 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0438 \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439\u201d \u043a\u0430\u043a \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u0430).<\/span><\/p><\/blockquote>\n<p>\u0414\u043e\u0431\u0430\u0432\u043b\u044f\u0435\u043c \u0432 <strong>API<\/strong> <span style=\"color: #0000ff;\"><b>CalculatorBrain<\/b><\/span>\u00a0\u043d\u043e\u0432\u044b\u0439 \u043c\u0435\u0442\u043e\u0434 <strong><span style=\"color: #0000ff;\">undoLast ()<\/span><\/strong><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-2.44.31-PM.png\" rel=\"attachment wp-att-4863\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4863 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-2.44.31-PM.png\" alt=\"Screen Shot 2016-06-09 at 2.44.31 PM\" width=\"1070\" height=\"162\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-2.44.31-PM.png 1070w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-2.44.31-PM-300x45.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-2.44.31-PM-768x116.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-2.44.31-PM-1024x155.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-2.44.31-PM-500x76.png 500w\" sizes=\"auto, (max-width: 1070px) 100vw, 1070px\" \/><\/a><\/p>\n<p>\u0418 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c \u0435\u0433\u043e \u0432 \u043d\u0430\u0448\u0435\u043c\u00a0<strong>Controller<\/strong>\u00a0\u043d\u0430 \u043a\u043d\u043e\u043f\u043a\u0435 &#171;<strong>backspace<\/strong>&#187;<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-2.48.42-PM.png\" rel=\"attachment wp-att-4864\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4864 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-2.48.42-PM.png\" alt=\"Screen Shot 2016-06-09 at 2.48.42 PM\" width=\"1090\" height=\"384\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-2.48.42-PM.png 1090w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-2.48.42-PM-300x106.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-2.48.42-PM-768x271.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-2.48.42-PM-1024x361.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-2.48.42-PM-500x176.png 500w\" sizes=\"auto, (max-width: 1090px) 100vw, 1090px\" \/><\/a><\/p>\n<p>\u041f\u043e\u0441\u043b\u0435 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 &#171;Undo&#187; \u043d\u0430\u043c \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e \u043f\u0440\u043e\u0432\u0435\u0440\u0438\u0442\u044c \u0440\u0430\u0431\u043e\u0442\u043e\u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u0441\u0442\u044c \u0441\u0438\u0442\u0443\u0430\u0446\u0438\u0438, \u0443\u043a\u0430\u0437\u0430\u043d\u043d\u043e\u0439 \u0432 \u043f\u043e\u0434\u0441\u043a\u0430\u0437\u043a\u0435 \u2116 3:<br \/>\n<span style=\"font-weight: 400;\">&#171;\u041d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0432\u0435\u0449\u0438 (\u043f\u043e\u0434\u043e\u0431\u043d\u044b\u0435 <span style=\"color: #993366;\"><b>\u03c0<\/b><\/span> \u0438\u043b\u0438 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u0434\u0440\u0443\u0433\u043e\u0433\u043e \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u044f) \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u0445\u0438\u0442\u0440\u043e\u0443\u043c\u043d\u043e \u0437\u0430\u043f\u043e\u043c\u0438\u043d\u0430\u0442\u044c \u0432 <b>M<\/b> \u043f\u043e\u0441\u043b\u0435 \u0442\u043e\u0433\u043e, \u043a\u0430\u043a \u0432\u044b \u0432\u0432\u0435\u043b\u0438 \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u0435, \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u0432\u044b \u0445\u043e\u0442\u0438\u0442\u0435 \u043e\u0446\u0435\u043d\u0438\u0442\u044c (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0432\u0432\u0435\u043b\u0438 cos(<b>M<\/b>), \u0430 \u0437\u0430\u0442\u0435\u043c \u043f\u044b\u0442\u0430\u0435\u0442\u0435\u0441\u044c \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442\u044c <b>M<\/b> \u0432 <span style=\"color: #993366;\"><b> \u03c0<\/b><\/span>). \u041a\u0430\u043a \u0442\u043e\u043b\u044c\u043a\u043e \u0432\u044b \u0440\u0435\u0430\u043b\u0438\u0437\u0443\u0435\u0442\u0435 <b>Undo<\/b>, \u0432\u044b \u0441\u043c\u043e\u0436\u0435\u0442\u0435 \u044d\u0442\u043e \u0441\u0434\u0435\u043b\u0430\u0442\u044c (\u043f\u0443\u0442\u0435\u043c \u201cundoing\u201d \u044d\u0442\u043e\u0433\u043e \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u044f, \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0441\u0442\u043e \u043d\u0430\u0436\u0430\u0442\u0438\u0435\u043c <span style=\"color: #800080;\"><b>\u03c0<\/b><\/span> \u0434\u043b\u044f \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u044f \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f, \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u0432\u044b \u0445\u043e\u0442\u0438\u0442\u0435 \u0437\u0430\u043f\u043e\u043c\u043d\u0438\u0442\u044c \u0432 <b>M<\/b>).&#187;<\/span><br \/>\n\u0414\u043b\u044f \u00a0\u044d\u0442\u043e\u0433\u043e \u0432\u0432\u043e\u0434\u0438\u043c:<br \/>\n<span style=\"color: #5479e8;\"><b>\u00a0M cos \u00a0<\/b><\/span>&gt;\u21d2\u00a0<span style=\"color: #0000ff;\"><b>description<\/b><\/span>\u00a0\u0438\u043c\u0435\u0435\u0442 \u0432\u0438\u0434 <strong><span style=\"color: #ff6600;\">cos<\/span><\/strong><strong><span style=\"color: #ff6600;\">(M) =<\/span><\/strong>,\u00a0<span style=\"color: #0000ff;\"><b>display<\/b><\/span>\u00a0\u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u0435\u0442<strong> 1<\/strong>, \u0442\u0430\u043a \u043a\u0430\u043a\u00a0<span style=\"color: #0000ff;\"><b>M<\/b><\/span>\u00a0\u043d\u0435 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0430 (\u0442\u043e \u0435\u0441\u0442\u044c \u0440\u0430\u0432\u043d\u0430 0)<br \/>\n\u0417\u0430\u0442\u0435\u043c \u0432\u0432\u043e\u0434\u0438\u043c:<br \/>\n<span style=\"color: #5479e8;\"><b>\u00a0\u03c0 \u2192M<\/b>\u00a0<\/span> \u21d2\u00a0<span style=\"color: #0000ff;\"><b>description<\/b><\/span>&gt;\u00a0\u0438\u043c\u0435\u0435\u0442 \u0432\u0438\u0434\u00a0<strong><span style=\"color: #ff6600;\">\u03c0<\/span><\/strong><strong><span style=\"color: #ff6600;\">\u00a0=<\/span><\/strong>,\u00a0<span style=\"color: #0000ff;\"><b>display<\/b><\/span>\u00a0\u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u0435\u0442<strong> 3.141593<\/strong><br \/>\n<span style=\"color: #5479e8;\"><b>Undo \u00a0<\/b><\/span> \u21d2\u00a0<span style=\"color: #0000ff;\"><b>description<\/b><\/span>\u00a0\u0438\u043c\u0435\u0435\u0442 \u0432\u0438\u0434\u00a0<strong><span style=\"color: #ff6600;\">cos<\/span><\/strong> <strong><span style=\"color: #ff6600;\">(M) =<\/span><\/strong>,\u00a0<span style=\"color: #0000ff;\"><b>display<\/b><\/span>\u00a0\u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u0435\u0442 <strong>-1<\/strong>, \u0442\u0430\u043a \u043a\u0430\u043a\u00a0<span style=\"color: #0000ff;\"><b>M<\/b><\/span>\u00a0\u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0430 \u0432\u00a0<b>\u00a0<span style=\"color: #800080;\">\u03c0<\/span><\/b><br \/>\n\u041a\u043e\u0434 \u043c\u043e\u0436\u043d\u043e \u043f\u043e\u0441\u043c\u043e\u0442\u0440\u0435\u0442\u044c \u043d\u0430\u00a0<strong><a href=\"https:\/\/github.com\/BestKora\/Assignment-2-2016-Calculator\">Github<\/a>\u00a0<\/strong>\u0434\u043b\u044f<strong>\u00a0Xcode 7<\/strong>\u00a0\u0438<strong>\u00a0Swift 2.2<\/strong>.<\/p>\n<p>\u0415\u0441\u043b\u0438 \u0432\u044b \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u043b\u0438\u00a0<strong>Xcode 8<\/strong>, \u0442\u043e \u0434\u043b\u044f\u00a0<strong>Swift 2.3<\/strong>\u00a0\u043a\u043e\u0434\u00a0\u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f\u00a0\u043d\u0430\u00a0<a href=\"https:\/\/github.com\/BestKora\/Swift-2.3-Solution-Spring-2016\"><strong>Github<\/strong><\/a>, \u0430 \u0434\u043b\u044f\u00a0<strong>Swift 3<\/strong>\u00a0&#8212;\u00a0\u0442\u0430\u043a\u0436\u0435 \u043d\u0430<a href=\"https:\/\/github.com\/BestKora\/Swift-3-Solution-Spring-2016\">\u00a0<strong>Github<\/strong><\/a>.<\/p>\n<h2>\u041f\u0443\u043d\u043a\u0442 1 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439<\/h2>\n<blockquote><p><span style=\"font-weight: 400;\">\u0412\u0430\u0448 \u041a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440 \u0434\u043e\u043b\u0436\u0435\u043d \u0441\u043e\u043e\u0431\u0449\u0430\u0442\u044c \u043e\u0431 \u043e\u0448\u0438\u0431\u043a\u0430\u0445. \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, <b> \u221a <\/b>\u00a0\u0438\u0437 \u043e\u0442\u0440\u0438\u0446\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u0447\u0438\u0441\u043b\u0430 \u0438\u043b\u0438 \u0434\u0435\u043b\u0435\u043d\u0438\u0435 \u043d\u0430 \u043d\u0443\u043b\u044c. \u0415\u0441\u0442\u044c \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u0441\u043f\u043e\u0441\u043e\u0431\u043e\u0432 \u201c\u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u0438\u044f\u201d \u044d\u0442\u0438\u0445 \u043e\u0448\u0438\u0431\u043e\u043a \u00a0(\u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u0434\u043e\u0431\u0430\u0432\u0438\u0442\u044c \u0430\u0441\u0441\u043e\u0446\u0438\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u043a <b><span style=\"color: #0000ff;\">Unary<\/span>\/ <span style=\"color: #0000ff;\">BinaryOperation<\/span><\/b> \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u0430\u043c, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u044f\u0432\u043b\u044f\u044e\u0442\u0441\u044f \u0444\u0443\u043d\u043a\u0446\u0438\u044f\u043c\u0438, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0438\u0432\u0430\u044e\u0442 \u043e\u0448\u0438\u0431\u043a\u0443, \u0438\u043b\u0438, \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e, \u0437\u0430\u0441\u0442\u0430\u0432\u0438\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u044e, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0430\u0441\u0441\u043e\u0446\u0438\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u0441 <b><span style=\"color: #0000ff;\">Unary<\/span>\/ <span style=\"color: #0000ff;\">BinaryOperation<\/span><\/b> \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0442\u044c \u043a\u043e\u0440\u0442\u0435\u0436 \u043a\u0430\u043a \u0441 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u043e\u043c <span style=\"color: #0000ff;\"><b>result<\/b><\/span>, \u0442\u0430\u043a \u0438 \u0441 \u043e\u0448\u0438\u0431\u043a\u043e\u0439 <span style=\"color: #0000ff;\"><b>error<\/b><\/span> (\u0435\u0441\u043b\u0438 \u043e\u043d\u0430 \u0435\u0441\u0442\u044c) \u0438\u043b\u0438 ???). \u0422\u043e, \u043a\u0430\u043a \u0432\u044b \u0431\u0443\u0434\u0435\u0442\u0435 \u0441\u043e\u043e\u0431\u0449\u0430\u0442\u044c \u043e \u043b\u044e\u0431\u044b\u0445 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u043d\u044b\u0445 \u043e\u0448\u0438\u0431\u043a\u0430\u0445 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f\u043c <span style=\"color: #0000ff;\"><b>CalculatorBrain<\/b><\/span><b> API<\/b>, \u043f\u043e\u0442\u0440\u0435\u0431\u0443\u0435\u0442 \u043e\u0442 \u0432\u0430\u0441 \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439 <b>API<\/b>, \u043d\u043e \u043d\u0435 \u0437\u0430\u0441\u0442\u0430\u0432\u043b\u044f\u0439\u0442\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 <span style=\"color: #0000ff;\"><b>CalculatorBrain<\/b><\/span> <b>API<\/b> \u0438\u043c\u0435\u0442\u044c \u0434\u0435\u043b\u043e \u0441 \u043e\u0448\u0438\u0431\u043a\u0430\u043c\u0438, \u0435\u0441\u043b\u0438 \u043e\u043d\u0438 \u044d\u0442\u043e\u0433\u043e \u043d\u0435 \u0445\u043e\u0442\u044f\u0442 (\u0442\u043e \u0435\u0441\u0442\u044c \u043f\u043e\u0437\u0432\u043e\u043b\u044c\u0442\u0435 <b>C<\/b>ontrollers, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0445\u043e\u0442\u044f\u0442 \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u0442\u044c <b>errors<\/b>, \u0434\u0435\u043b\u0430\u0442\u044c \u044d\u0442\u043e, \u0430 \u0434\u0440\u0443\u0433\u0438\u043c, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043d\u0435 \u0445\u043e\u0442\u044f\u0442 \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u0442\u044c \u043e\u0448\u0438\u0431\u043a\u0438, \u00a0\u043f\u043e\u0437\u0432\u043e\u043b\u044c\u0442\u0435 \u0438\u043c\u0435\u0442\u044c \u0434\u0435\u043b\u043e \u043f\u0440\u043e\u0441\u0442\u043e \u0441 <b>NaN<\/b> \u0438\u043b\u0438 <b>+\u221e<\/b>, \u043f\u043e\u044f\u0432\u043b\u044f\u044e\u0449\u0438\u043c\u0438\u0441\u044f \u043d\u0430 \u0432\u0430\u0448\u0435\u043c <b>UI<\/b>). \u0414\u0440\u0443\u0433\u0438\u043c\u0438 \u0441\u043b\u043e\u0432\u0430\u043c\u0438, <b>\u043d\u0435 \u0438\u0437\u043c\u0435\u043d\u044f\u0439\u0442\u0435 \u043d\u0438\u043a\u0430\u043a\u0438\u0435 \u0438\u0437 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0445 \u043c\u0435\u0442\u043e\u0434\u043e\u0432 \u0438 \u0441\u0432\u043e\u0439\u0441\u0442\u0432 \u0432 <\/b><b>non-private<\/b><b> API <\/b><span style=\"color: #0000ff;\"><b>CalculatorBrain<\/b><\/span><b> \u0434\u043b\u044f \u0442\u043e\u0433\u043e, \u0447\u0442\u043e\u0431\u044b \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0442\u044c \u044d\u0442\u0438 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438 <\/b>\u00a0(\u0432\u043c\u0435\u0441\u0442\u043e \u044d\u0442\u043e\u0433\u043e \u0434\u043e\u0431\u0430\u0432\u044c\u0442\u0435 \u043c\u0435\u0442\u043e\u0434\u044b \/ \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u0430, \u0435\u0441\u043b\u0438 \u044d\u0442\u043e \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e).<\/span><\/p><\/blockquote>\n<p>\u041d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e\u00a0\u0443\u043c\u0435\u0442\u044c \u0441\u043f\u0440\u0430\u0448\u0438\u0432\u0430\u0442\u044c \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438\u00a0<strong><span style=\"color: #0000ff;\">BinaryOperation<\/span><\/strong>\u00a0\u0438\u00a0<strong><span style=\"color: #0000ff;\">UnaryOperation<\/span><\/strong>, \u043a\u0430\u043a\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 (\u0435\u0441\u043b\u0438 \u043e\u043d\u0438 \u0435\u0441\u0442\u044c) \u0431\u0443\u0434\u0443\u0442 \u0433\u0435\u043d\u0435\u0440\u0438\u0440\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u043f\u0440\u0438 \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0438 \u0432 \u043d\u0438\u0445 \u00a0\u043e\u043f\u0435\u0440\u0430\u043d\u0434\u0430 (\u043e\u0432).<br \/>\n\u041e\u0434\u0438\u043d \u0438\u0437 \u0441\u043f\u043e\u0441\u043e\u0431\u043e\u0432 \u0441\u0434\u0435\u043b\u0430\u0442\u044c \u044d\u0442\u043e &#8212; \u0438\u043c\u0435\u0442\u044c \u0434\u043b\u044f<strong>\u00a0<span style=\"color: #0000ff;\">BinaryOperation<\/span><\/strong>\u00a0\u0438<strong>\u00a0<span style=\"color: #0000ff;\">UnaryOperation<\/span>\u00a0<\/strong>\u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439 \u0430\u0441\u0441\u043e\u0446\u0438\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 , \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0442 \u0441\u043e\u0431\u043e\u0439\u00a0<strong><span style=\"text-decoration: underline;\"><i>\u0444\u0443\u043d\u043a\u0446\u0438\u044e<\/i><\/span><\/strong>, \u0430\u043d\u0430\u043b\u0438\u0437\u0438\u0440\u0443\u044e\u0449\u0443\u044e \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u044b\u0435 \u0430\u0440\u0433\u0443\u043c\u0435\u043d\u0442\u044b \u0438 \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u044e\u0449\u0443\u044e \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u0435\u00a0<strong><span style=\"color: #0000ff;\">String\u00a0<\/span><\/strong>\u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0435 \u043e\u0431 \u00a0\u043e\u0448\u0438\u0431\u043a\u0435, \u0435\u0441\u043b\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 \u0433\u0435\u043d\u0435\u0440\u0438\u0440\u0443\u0435\u0442 \u043e\u0448\u0438\u0431\u043a\u0443 (\u0438\u043b\u0438\u00a0<strong><span style=\"color: #0000ff;\">nil\u00a0<\/span><\/strong> \u0432 \u043f\u0440\u043e\u0442\u0438\u0432\u043d\u043e\u043c \u0441\u043b\u0443\u0447\u0430\u0435).<br \/>\n\u0411\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u043e \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439 \u043d\u0435 \u043c\u043e\u0433\u0443\u0442 \u0441\u043e\u043e\u0431\u0449\u0430\u0442\u044c \u043e \u043a\u0430\u043a\u0438\u0445-\u0442\u043e \u043e\u0448\u0438\u0431\u043a\u0430\u0445, \u0434\u0430 \u043c\u044b \u0438 \u043d\u0435 \u043e\u0431\u044f\u0437\u0430\u043d\u044b \u0437\u0430\u0441\u0442\u0430\u0432\u043b\u044f\u0442\u044c \u0438\u0445 \u044d\u0442\u043e \u0434\u0435\u043b\u0430\u0442\u044c. \u0412 \u044d\u0442\u043e\u043c \u0441\u043b\u0443\u0447\u0430\u0435 \u043c\u044b \u0431\u0443\u0434\u0435\u043c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u00a0<strong><span style=\"color: #0000ff;\">nil<\/span><\/strong>\u00a0\u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435\u00a0<strong><span style=\"text-decoration: underline;\"><em>\u0444\u0443\u043d\u043a\u0446\u0438\u0438<\/em><\/span><\/strong>, \u0442\u0435\u0441\u0442\u0438\u0440\u0443\u044e\u0449\u0435\u0439 \u043e\u0448\u0438\u0431\u043a\u0438. \u041c\u043e\u0436\u043d\u043e \u0441\u0434\u0435\u043b\u0430\u0442\u044c<strong>\u00a0<span style=\"color: #0000ff;\">Optional<\/span><\/strong>\u00a0\u0446\u0435\u043b\u0438\u043a\u043e\u043c<strong>\u00a0<span style=\"text-decoration: underline; color: #ff0000;\">\u0442\u0438\u043f \u0444\u0443\u043d\u043a\u0446\u0438\u0438<\/span>,<\/strong>\u00a0\u0440\u0430\u0437\u043c\u0435\u0449\u0430\u044f<strong><span style=\"text-decoration: underline; color: #ff0000;\">\u00a0\u0442\u0438\u043f \u0444\u0443\u043d\u043a\u0446\u0438\u0438<\/span>\u00a0<\/strong>\u0432 \u043a\u0440\u0443\u0433\u043b\u044b\u0445 \u0441\u043a\u043e\u0431\u043a\u0430\u0445 \u0438 \u0441\u0442\u0430\u0432\u044f \u0437\u043d\u0430\u043a<strong><span style=\"color: #0000ff;\">\u00a0?<\/span><\/strong>\u00a0\u043f\u043e\u0441\u043b\u0435 \u043a\u0440\u0443\u0433\u043b\u044b\u0445 \u0441\u043a\u043e\u0431\u043e\u043a. \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440,<strong>\u00a0<span style=\"color: #0000ff;\">((Double, Double ) -&gt; String?)?\u00a0<\/span><\/strong>&#8212; \u044d\u0442\u043e \u00a0<strong><span style=\"color: #0000ff;\">Optional<\/span>\u00a0\u00a0<em><span style=\"text-decoration: underline;\">\u0444\u0443\u043d\u043a\u0446\u0438\u044f<\/span><\/em><\/strong>, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0431\u0435\u0440\u0435\u0442 \u0434\u0432\u0430<strong><span style=\"color: #0000ff;\">\u00a0Double<\/span><\/strong>\u00a0\u0438 \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442<strong><span style=\"color: #0000ff;\">\u00a0Optional<\/span>\u00a0&lt;<span style=\"color: #0000ff;\">String&gt;<\/span>.<\/strong><br \/>\n\u0414\u043e\u0431\u0430\u0432\u043b\u044f\u0435\u043c \u043a \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044f\u043c\u00a0<strong><span style=\"color: #0000ff;\">BinaryOperation<\/span><\/strong>\u00a0\u0438<strong>\u00a0<span style=\"color: #0000ff;\">UnaryOperation<\/span><\/strong>\u00a0\u043d\u043e\u0432\u043e\u0435 \u0430\u0441\u0441\u043e\u0446\u0438\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u0432 \u0432\u0438\u0434\u0435 \u0442\u0438\u043f\u0430 \u0442\u0435\u0441\u0442\u0438\u0440\u0443\u044e\u0449\u0435\u0439 \u043e\u0448\u0438\u0431\u043a\u0443 \u0444\u0443\u043d\u043a\u0446\u0438\u0438.<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-3.24.06-PM.png\" rel=\"attachment wp-att-4865\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4865 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-3.24.06-PM.png\" alt=\"Screen Shot 2016-06-09 at 3.24.06 PM\" width=\"1288\" height=\"258\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-3.24.06-PM.png 1288w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-3.24.06-PM-300x60.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-3.24.06-PM-768x154.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-3.24.06-PM-1024x205.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-3.24.06-PM-500x100.png 500w\" sizes=\"auto, (max-width: 1288px) 100vw, 1288px\" \/><\/a><\/p>\n<p><strong>\u00a0\u0417\u0434\u0435\u0441\u044c \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u044b \u0434\u0432\u0430 \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u0430:<\/strong><\/p>\n<ul>\n<li>\u043f\u0435\u0440\u0432\u044b\u0439 &#8212; \u0435\u0441\u043b\u0438 \u0441\u0430\u043c\u0430 \u0442\u0435\u0441\u0442\u0438\u0440\u0443\u044e\u0449\u0430\u044f \u043e\u0448\u0438\u0431\u043a\u0438 \u0444\u0443\u043d\u043a\u0446\u0438\u044f \u043d\u0435 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0430, \u0442\u043e \u0435\u0441\u0442\u044c \u0441\u0430\u043c\u0430 \u0444\u0443\u043d\u043a\u0446\u0438\u044f\u00a0<span style=\"color: #0000ff;\"><b>errorTest<\/b><\/span>\u00a0-\u044d\u0442\u043e\u00a0<span style=\"color: #0000ff;\"><b>nil<\/b><\/span>,<\/li>\n<li>\u0432\u0442\u043e\u0440\u043e\u0439 &#8212; \u0444\u0443\u043d\u043a\u0446\u0438\u044f\u00a0<span style=\"color: #0000ff;\"><b>errorTest<\/b><\/span>\u00a0\u043d\u0435\u00a0<span style=\"color: #0000ff;\"><b>nil<\/b><\/span>, \u043d\u043e \u043e\u043d\u0430 \u0434\u0435\u043a\u043b\u0430\u0440\u0438\u0440\u043e\u0432\u0430\u043d\u0430 \u0442\u0430\u043a, \u0447\u0442\u043e \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442\u00a0<span style=\"color: #0000ff;\"><b>nil<\/b><\/span>. \u042d\u0442\u043e \u043e\u0447\u0435\u043d\u044c \u0443\u0434\u043e\u0431\u043d\u043e.<\/li>\n<\/ul>\n<p>\u0412 \u043d\u0430\u0448\u0435\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0442\u043e\u043b\u044c\u043a\u043e \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0443\u043d\u0430\u0440\u043d\u044b\u0435 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 \u0442\u0438\u043f\u0430\u00a0<strong><span style=\"color: #0000ff;\">\u221a<\/span><\/strong>,\u00a0<strong><span style=\"color: #0000ff;\">ln<\/span><\/strong>,\u00a0<strong><span style=\"color: #0000ff;\">x\u207b\u00b9<\/span><\/strong>,<strong><span style=\"color: #0000ff;\">\u00a0sin\u207b\u00b9<\/span><\/strong>,\u00a0<strong><span style=\"color: #0000ff;\">cos\u207b\u00b9\u00a0<\/span><\/strong>\u0438 \u0431\u0438\u043d\u0430\u0440\u043d\u0430\u044f \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 &#171;\u0434\u0435\u043b\u0435\u043d\u0438\u0435&#187;\u00a0\u00a0\u043f\u043e\u043b\u0443\u0447\u0430\u044e\u0442 \u0442\u0435\u0441\u0442\u0438\u0440\u0443\u044e\u0449\u0443\u044e \u043e\u0448\u0438\u0431\u043a\u0443 \u0444\u0443\u043d\u043a\u0446\u0438\u044e.<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.12.09-PM.png\" rel=\"attachment wp-att-4867\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4867 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.12.09-PM.png\" alt=\"Screen Shot 2016-06-09 at 4.12.09 PM\" width=\"1106\" height=\"958\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.12.09-PM.png 1106w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.12.09-PM-300x260.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.12.09-PM-768x665.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.12.09-PM-1024x887.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.12.09-PM-346x300.png 346w\" sizes=\"auto, (max-width: 1106px) 100vw, 1106px\" \/><\/a><\/p>\n<p>\u041e\u0448\u0438\u0431\u043a\u0443 \u0431\u0443\u0434\u0435\u043c \u0444\u0438\u043a\u0441\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0432 <strong><span style=\"color: #0000ff;\">private<\/span><\/strong> \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 <strong><span style=\"color: #0000ff;\">error: String?<\/span><\/strong><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.16.43-PM.png\" rel=\"attachment wp-att-4869\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4869 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.16.43-PM.png\" alt=\"Screen Shot 2016-06-09 at 4.16.43 PM\" width=\"1062\" height=\"186\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.16.43-PM.png 1062w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.16.43-PM-300x53.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.16.43-PM-768x135.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.16.43-PM-1024x179.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.16.43-PM-500x88.png 500w\" sizes=\"auto, (max-width: 1062px) 100vw, 1062px\" \/><\/a><\/p>\n<p>. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0.<br \/>\n\u041f\u0440\u0435\u0436\u0434\u0435, \u0447\u0435\u043c \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u0443\u043d\u0430\u0440\u043d\u0443\u044e \u0438\u043b\u0438 \u0431\u0438\u043d\u0430\u0440\u043d\u0443\u044e \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044e, \u0442\u0435\u0441\u0442\u0438\u0440\u0443\u0435\u043c \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u043d\u044b\u0435 \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u044b \u043d\u0430 \u043e\u0448\u0438\u0431\u043a\u0443. \u0415\u0441\u043b\u0438 \u043e\u0448\u0438\u0431\u043a\u0430 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u0430, \u0442\u043e \u0444\u0438\u043a\u0441\u0438\u0440\u0443\u0435\u043c \u043e\u0448\u0438\u0431\u043a\u0443 \u0432 <span style=\"color: #0000ff;\"><strong>error<\/strong>.\u00a0<\/span><br \/>\n. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0.<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.23.58-PM.png\" rel=\"attachment wp-att-4874\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4874 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.23.58-PM.png\" alt=\"Screen Shot 2016-06-09 at 7.23.58 PM\" width=\"1068\" height=\"136\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.23.58-PM.png 1068w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.23.58-PM-300x38.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.23.58-PM-768x98.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.23.58-PM-1024x130.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.23.58-PM-500x64.png 500w\" sizes=\"auto, (max-width: 1068px) 100vw, 1068px\" \/><\/a><\/p>\n<p>. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0.<\/p>\n<p>\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441 \u201c\u0446\u0435\u043f\u043e\u0447\u0435\u043a\u201d\u00a0<strong><span style=\"color: #0000ff;\">Optionals<\/span><\/strong> \u0438 \u043f\u0438\u0448\u0435\u043c \u0444\u0443\u043d\u043a\u0446\u0438\u0438 <strong><span style=\"color: #0000ff;\">validator<\/span><\/strong> c \u0432\u043e\u043f\u0440\u043e\u0441\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u043c <strong><span style=\"color: #0000ff;\">?<\/span><\/strong> \u0437\u043d\u0430\u043a\u043e\u043c\u00a0\u0438 \u0437\u0434\u0435\u0441\u044c \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u044b \u0434\u0432\u0430 \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u0430:<\/p>\n<ul>\n<li>\u043f\u0435\u0440\u0432\u044b\u0439 &#8212; \u0435\u0441\u043b\u0438 \u00a0\u0444\u0443\u043d\u043a\u0446\u0438\u044f\u00a0<span style=\"color: #0000ff;\"><b>validator<\/b><\/span>\u00a0\u043d\u0435 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0430, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0434\u043b\u044f \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439 &#171;<strong><span style=\"color: #0000ff;\">sin<\/span><\/strong>&#171;,&#187;<strong><span style=\"color: #0000ff;\">cos<\/span><\/strong>&#171;,&#187;<strong><span style=\"color: #0000ff;\">tan<\/span><\/strong>&#171;, \u0442\u043e <strong><span style=\"color: #0000ff;\">error<\/span><\/strong> \u0440\u0430\u0432\u043d\u043e\u00a0<span style=\"color: #0000ff;\"><b>nil<\/b><\/span>,<\/li>\n<li>\u0432\u0442\u043e\u0440\u043e\u0439 &#8212; \u0444\u0443\u043d\u043a\u0446\u0438\u044f\u00a0<span style=\"color: #0000ff;\"><b>validator<\/b><\/span>\u00a0\u043d\u0435\u00a0<span style=\"color: #0000ff;\"><b>nil<\/b><\/span>, \u043d\u043e \u043e\u043d\u0430 \u0434\u0435\u043a\u043b\u0430\u0440\u0438\u0440\u043e\u0432\u0430\u043d\u0430 \u0442\u0430\u043a, \u0447\u0442\u043e \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442 <strong><span style=\"color: #0000ff;\">nil<\/span><\/strong> \u0432 \u0441\u043b\u0443\u0447\u0430\u0435 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u044f \u043e\u0448\u0438\u0431\u043a\u0438. \u042d\u0442\u043e \u043e\u0447\u0435\u043d\u044c \u0443\u0434\u043e\u0431\u043d\u043e.<\/li>\n<\/ul>\n<p>\u0417\u0434\u0435\u0441\u044c \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u043e\u0447\u0435\u043d\u044c \u0443\u0434\u0430\u0447\u043d\u043e \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0442 \u0434\u0432\u0430 \u043f\u0435\u0440\u0435\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u044b\u0445 \u0432\u044b\u0448\u0435 \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u0430. \u0415\u0441\u043b\u0438 \u0443 \u0432\u0430\u0448\u0435\u0439 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, &#171;<strong><span style=\"color: #0000ff;\">sin<\/span><\/strong>&#187; \u0438\u043b\u0438 &#171;<strong><span style=\"color: #0000ff;\">cos<\/span><\/strong>&#187; \u043d\u0435\u0442 \u0442\u0435\u0441\u0442\u0438\u0440\u0443\u044e\u0449\u0435\u0439 \u0444\u0443\u043d\u043a\u0446\u0438\u0438, \u0442\u043e<strong><span style=\"color: #0000ff;\">\u00a0error = nil<\/span><\/strong>\u00a0\u0438 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0435 \u043e\u0431 \u043e\u0448\u0438\u0431\u043a\u0435 \u043d\u0435 \u0431\u0443\u0434\u0435\u0442 \u0432\u044b\u0434\u0430\u043d\u043e. \u0415\u0441\u043b\u0438 \u0443 \u0432\u0430\u0441 \u0435\u0441\u0442\u044c \u0442\u0435\u0441\u0442\u0438\u0440\u0443\u044e\u0449\u0430\u044f \u0444\u0443\u043d\u043a\u0446\u0438\u044f, \u043a\u0430\u043a \u0443 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 &#171;<strong><span style=\"color: #0000ff;\">\u221a<\/span><\/strong>&#171;, \u0430 \u0430\u0440\u0433\u0443\u043c\u0435\u043d\u0442 \u043d\u0435 \u0434\u0430\u0435\u0442 &#171;\u041e\u0442\u0440\u0438\u0446\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435&#187;, \u0442\u043e \u0435\u0441\u0442\u044c \u0432\u0442\u043e\u0440\u043e\u0439 \u0438\u0437 \u0432\u044b\u0448\u0435\u043f\u0435\u0440\u0435\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u044b\u0445 \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u043e\u0432, \u0442\u043e \u0442\u0430\u043a\u0436\u0435 \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442\u0441\u044f\u00a0<strong><span style=\"color: #0000ff;\">nil<\/span><\/strong>\u00a0\u0438 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0435 \u043e\u0431 \u043e\u0448\u0438\u0431\u043a\u0435 \u043d\u0435 \u0431\u0443\u0434\u0435\u0442. \u0418\u043c\u0435\u043d\u043d\u043e \u044d\u0442\u043e \u0434\u0432\u043e\u044f\u043a\u043e\u0435 \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u043e \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0439 \u043d\u0430\u043c\u0438 \u0444\u0443\u043d\u043a\u0446\u0438\u0438\u00a0<span style=\"color: #0000ff;\"><b>validator<\/b><b>\u00a0<\/b><span style=\"color: #000000;\">\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043e\u0447\u0435\u043d\u044c \u0443\u0434\u043e\u0431\u043d\u044b\u043c \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u043e\u0448\u0438\u0431\u043e\u043a.<\/span><\/span><br \/>\n\u0411\u0438\u043d\u0430\u0440\u043d\u0430\u044f \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044f \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u0432 \u043e\u0442\u043b\u043e\u0436\u0435\u043d\u043d\u043e\u043c \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0438, \u043f\u043e\u044d\u0442\u043e\u043c\u0443 \u0442\u0435\u0441\u0442\u0438\u0440\u0443\u044e\u0449\u0443\u044e \u0444\u0443\u043d\u043a\u0446\u0438\u044e \u043d\u0443\u0436\u043d\u043e \u0437\u0430\u043f\u043e\u043c\u043d\u0438\u0442\u044c \u0432 \u043e\u0442\u043b\u043e\u0436\u0435\u043d\u043d\u043e\u0439 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0435\u00a0<strong><span style=\"color: #0000ff;\">PendingBinaryOperationInfo<\/span><\/strong><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.25.35-PM.png\" rel=\"attachment wp-att-4871\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4871 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.25.35-PM.png\" alt=\"Screen Shot 2016-06-09 at 4.25.35 PM\" width=\"1058\" height=\"226\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.25.35-PM.png 1058w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.25.35-PM-300x64.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.25.35-PM-768x164.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.25.35-PM-1024x219.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.25.35-PM-500x107.png 500w\" sizes=\"auto, (max-width: 1058px) 100vw, 1058px\" \/><\/a><\/p>\n<p>. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0. \u00a0.<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.33.03-PM.png\" rel=\"attachment wp-att-4872\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4872 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.33.03-PM.png\" alt=\"Screen Shot 2016-06-09 at 4.33.03 PM\" width=\"1218\" height=\"324\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.33.03-PM.png 1218w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.33.03-PM-300x80.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.33.03-PM-768x204.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.33.03-PM-1024x272.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-4.33.03-PM-500x133.png 500w\" sizes=\"auto, (max-width: 1218px) 100vw, 1218px\" \/><\/a><\/p>\n<p>\u0430 \u0437\u0430\u0442\u0435\u043c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u043f\u0440\u0438 \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0438 \u043d\u0430 \u043f\u0440\u0435\u0434\u043c\u0435\u0442 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u043e\u0448\u0438\u0431\u043a\u0438:<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.39.35-PM.png\" rel=\"attachment wp-att-4875\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4875 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.39.35-PM.png\" alt=\"Screen Shot 2016-06-09 at 7.39.35 PM\" width=\"1236\" height=\"302\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.39.35-PM.png 1236w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.39.35-PM-300x73.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.39.35-PM-768x188.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.39.35-PM-1024x250.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.39.35-PM-500x122.png 500w\" sizes=\"auto, (max-width: 1236px) 100vw, 1236px\" \/><\/a><\/p>\n<p>\u0418 \u043e\u043f\u044f\u0442\u044c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441 \u201c\u0446\u0435\u043f\u043e\u0447\u0435\u043a\u201d\u00a0<strong><span style=\"color: #0000ff;\">Optionals<\/span><\/strong>\u00a0\u0438 \u043f\u0438\u0448\u0435\u043c \u0444\u0443\u043d\u043a\u0446\u0438\u0438\u00a0<strong><span style=\"color: #0000ff;\">validator<\/span><\/strong>\u00a0c \u0432\u043e\u043f\u0440\u043e\u0441\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u043c\u00a0<strong><span style=\"color: #0000ff;\">?<\/span><\/strong>\u00a0\u0437\u043d\u0430\u043a\u043e\u043c\u00a0\u0438 \u043e\u043f\u044f\u0442\u044c \u0437\u0434\u0435\u0441\u044c \u0443\u0434\u0430\u0447\u043d\u043e \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0442 \u0434\u0432\u0430 \u043f\u0435\u0440\u0435\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u044b\u0445 \u0432\u044b\u0448\u0435 \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u0430. \u0415\u0441\u043b\u0438 \u0443 \u0432\u0430\u0448\u0435\u0439 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, &#171;<span style=\"color: #0000ff;\"><span style=\"color: #0000ff;\"><b>+<\/b><\/span><\/span>&#187; \u0438\u043b\u0438 &#171;<span style=\"color: #0000ff;\"><span style=\"color: #0000ff;\"><b>&#8212;<\/b><\/span><\/span>&#187; \u043d\u0435\u0442 \u0442\u0435\u0441\u0442\u0438\u0440\u0443\u044e\u0449\u0435\u0439 \u0444\u0443\u043d\u043a\u0446\u0438\u0438, \u0442\u043e<strong><span style=\"color: #0000ff;\">\u00a0error = nil<\/span><\/strong>\u00a0\u0438 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0435 \u043e\u0431 \u043e\u0448\u0438\u0431\u043a\u0435 \u043d\u0435 \u0431\u0443\u0434\u0435\u0442 \u0432\u044b\u0434\u0430\u043d\u043e. \u0415\u0441\u043b\u0438 \u0443 \u0432\u0430\u0441 \u0435\u0441\u0442\u044c \u0442\u0435\u0441\u0442\u0438\u0440\u0443\u044e\u0449\u0430\u044f \u0444\u0443\u043d\u043a\u0446\u0438\u044f, \u043a\u0430\u043a \u0443 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 \u0434\u0435\u043b\u0435\u043d\u0438\u044f &#171;<strong><span style=\"color: #0000ff;\">\u00f7<\/span><\/strong>&#171;,\u0430\u00a0\u0430\u0440\u0433\u0443\u043c\u0435\u043d\u0442\u044b \u043d\u0435 \u0434\u0430\u044e\u0442 &#171;\u0414\u0435\u043b\u0435\u043d\u0438\u0435 \u043d\u0430 \u043d\u043e\u043b\u044c&#187;, \u0442\u043e \u0435\u0441\u0442\u044c \u0432\u0442\u043e\u0440\u043e\u0439 \u0438\u0437 \u0432\u044b\u0448\u0435\u043f\u0435\u0440\u0435\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u044b\u0445 \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u043e\u0432, \u0442\u043e \u0442\u0430\u043a\u0436\u0435 \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442\u0441\u044f\u00a0<strong><span style=\"color: #0000ff;\">nil<\/span><\/strong>\u00a0\u0438 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0435 \u043e\u0431 \u043e\u0448\u0438\u0431\u043a\u0435 \u043d\u0435 \u0431\u0443\u0434\u0435\u0442. \u0418\u043c\u0435\u043d\u043d\u043e \u044d\u0442\u043e \u0434\u0432\u043e\u044f\u043a\u043e\u0435 \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u043e \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0439 \u043d\u0430\u043c\u0438 \u0444\u0443\u043d\u043a\u0446\u0438\u0438\u00a0<span style=\"color: #0000ff;\"><b>validator<\/b><b>\u00a0<\/b><span style=\"color: #000000;\">\u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043d\u0430\u043c \u0432\u0435\u0441\u0442\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0443 \u043e\u0448\u0438\u0431\u043e\u043a \u043e\u0434\u043d\u043e\u0439 \u0441\u0442\u0440\u043e\u043a\u043e\u0439.<\/span><\/span><br \/>\n\u0414\u043b\u044f \u0442\u043e\u0433\u043e, \u0447\u0442\u043e\u0431\u044b \u043f\u0435\u0440\u0435\u0434\u0430\u0442\u044c \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u043d\u0443\u044e \u0438\u043b\u0438 \u043d\u0435 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u043d\u0443\u044e \u043e\u0448\u0438\u0431\u043a\u0443 \u0432 <strong><span style=\"color: #0000ff;\">CalculatorViewController<\/span><\/strong>, \u0441\u0444\u043e\u0440\u043c\u0438\u0440\u0443\u0435\u043c <strong><span style=\"color: #0000ff;\">result<\/span><\/strong> \u0432 <strong><span style=\"color: #0000ff;\">CalculatorBrain<\/span><\/strong> \u0432 \u0432\u0438\u0434\u0435 \u043a\u043e\u0440\u0442\u0435\u0436\u0430, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u0442 \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u043e\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 accumulator \u0442\u0438\u043f\u0430 <strong><span style=\"color: #0000ff;\">Double<\/span><\/strong> \u0438 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0435 \u043e\u0431 \u043e\u0448\u0438\u0431\u043a\u0435 error \u0442\u0438\u043f\u0430 <strong><span style=\"color: #0000ff;\">String?<\/span><\/strong>:<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.58.31-PM.png\" rel=\"attachment wp-att-4876\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4876 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.58.31-PM.png\" alt=\"Screen Shot 2016-06-09 at 7.58.31 PM\" width=\"1062\" height=\"160\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.58.31-PM.png 1062w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.58.31-PM-300x45.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.58.31-PM-768x116.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.58.31-PM-1024x154.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-7.58.31-PM-500x75.png 500w\" sizes=\"auto, (max-width: 1062px) 100vw, 1062px\" \/><\/a><\/p>\n<p>\u0412 <strong><span style=\"color: #0000ff;\">CalculatorViewController<\/span><\/strong> \u0434\u043e\u0431\u0430\u0432\u0438\u043c \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0443\u044e \u043a\u043e\u0440\u0442\u0435\u0436 <strong><span style=\"color: #0000ff;\">resultValue<\/span><\/strong>, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0431\u0443\u0434\u0435\u0442 &#171;\u0432\u0441\u0442\u0440\u0435\u0447\u0430\u0442\u044c&#187; \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0438\u0440\u0443\u044e\u0449\u0435\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 <strong><span style=\"color: #0000ff;\">result<\/span><\/strong> \u0438\u0437 <strong><span style=\"color: #0000ff;\">CalculatorBrain<\/span><\/strong>, \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u044c \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u0443\u044e \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0443 \u043a\u043e\u0440\u0442\u0435\u0436\u0430 \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u043e\u043f\u0435\u0440\u0430\u0442\u043e\u0440\u0430 <strong><span style=\"color: #0000ff;\">switch<\/span><\/strong> c \u043f\u0430\u0442\u0442\u0435\u0440\u043d\u0430\u043c\u0438 \u00a0\u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0438\u044f \u043e\u0431\u0440\u0430\u0437\u0446\u0443 (<strong>pattern matching<\/strong>) \u0438 \u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043b\u044f\u0442\u044c \u0432\u0441\u044e \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u0443\u044e \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0443 <strong>UI<\/strong>:<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.11.30-PM.png\" rel=\"attachment wp-att-4877\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4877 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.11.30-PM.png\" alt=\"Screen Shot 2016-06-09 at 8.11.30 PM\" width=\"1152\" height=\"322\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.11.30-PM.png 1152w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.11.30-PM-300x84.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.11.30-PM-768x215.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.11.30-PM-1024x286.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.11.30-PM-500x140.png 500w\" sizes=\"auto, (max-width: 1152px) 100vw, 1152px\" \/><\/a><\/p>\n<p>\u0414\u043b\u044f \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0445 \u043a\u043d\u043e\u043f\u043e\u043a, \u0433\u0434\u0435 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u043e\u0442\u043e\u0431\u0440\u0430\u0436\u0430\u0435\u0442\u0441\u044f \u043d\u0430 \u0434\u0438\u0441\u043f\u043b\u0435\u0435, \u0432\u043c\u0435\u0441\u0442\u043e <strong><span style=\"color: #0000ff;\">dysplayValue<\/span><\/strong>, \u0443\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u0435\u043c \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u0434\u043b\u044f \u043d\u043e\u0432\u043e\u0439 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 <strong><span style=\"color: #0000ff;\">resultValue<\/span><\/strong><span style=\"color: #000000;\">:<\/span><br \/>\n<em><span style=\"text-decoration: underline;\">\u043a\u043d\u043e\u043f\u043a\u0430 \u0441 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044f\u043c\u0438<\/span><\/em><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.17.53-PM.png\" rel=\"attachment wp-att-4878\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4878 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.17.53-PM.png\" alt=\"Screen Shot 2016-06-09 at 8.17.53 PM\" width=\"1064\" height=\"324\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.17.53-PM.png 1064w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.17.53-PM-300x91.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.17.53-PM-768x234.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.17.53-PM-1024x312.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.17.53-PM-500x152.png 500w\" sizes=\"auto, (max-width: 1064px) 100vw, 1064px\" \/><\/a><\/p>\n<p><em><span style=\"text-decoration: underline;\">\u043a\u043d\u043e\u043f\u043a\u0430 backspace<\/span><\/em><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.20.49-PM.png\" rel=\"attachment wp-att-4879\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4879 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.20.49-PM.png\" alt=\"Screen Shot 2016-06-09 at 8.20.49 PM\" width=\"1066\" height=\"312\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.20.49-PM.png 1066w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.20.49-PM-300x88.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.20.49-PM-768x225.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.20.49-PM-1024x300.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.20.49-PM-500x146.png 500w\" sizes=\"auto, (max-width: 1066px) 100vw, 1066px\" \/><\/a><\/p>\n<p><em><span style=\"text-decoration: underline;\">\u043a\u043d\u043e\u043f\u043a\u0430 \u2192M<\/span><\/em><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.23.27-PM.png\" rel=\"attachment wp-att-4880\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4880 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.23.27-PM.png\" alt=\"Screen Shot 2016-06-09 at 8.23.27 PM\" width=\"1066\" height=\"226\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.23.27-PM.png 1066w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.23.27-PM-300x64.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.23.27-PM-768x163.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.23.27-PM-1024x217.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.23.27-PM-500x106.png 500w\" sizes=\"auto, (max-width: 1066px) 100vw, 1066px\" \/><\/a><\/p>\n<p><em><span style=\"text-decoration: underline;\">\u043a\u043d\u043e\u043f\u043a\u0430 M<\/span><\/em><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.26.55-PM.png\" rel=\"attachment wp-att-4881\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4881 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.26.55-PM.png\" alt=\"Screen Shot 2016-06-09 at 8.26.55 PM\" width=\"1058\" height=\"124\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.26.55-PM.png 1058w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.26.55-PM-300x35.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.26.55-PM-768x90.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.26.55-PM-1024x120.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.26.55-PM-500x59.png 500w\" sizes=\"auto, (max-width: 1058px) 100vw, 1058px\" \/><\/a><\/p>\n<p>\u041f\u0440\u0438\u043c\u0435\u0440 \u0440\u0430\u0431\u043e\u0442\u044b. \u0415\u0441\u043b\u0438 \u043c\u044b \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 <strong>M<\/strong> \u043d\u0430\u0431\u0435\u0440\u0435\u043c \u0444\u0443\u043d\u043a\u0446\u0438\u044e <strong>(sin(M)+M)<span style=\"color: #0000ff;\">\u00f7<\/span>M<\/strong>, \u0442\u043e \u043f\u043e\u043b\u0443\u0447\u0438\u043c &#171;\u0414\u0435\u043b\u0435\u043d\u0438\u0435 \u043d\u0430 \u043d\u043e\u043b\u044c&#187;, \u0442\u0430\u043a \u043a\u0430\u043a \u0435\u0441\u043b\u0438 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 <strong>M<\/strong> \u043d\u0435 \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d\u043e, \u0442\u043e \u043e\u043d\u043e \u0440\u0430\u0432\u043d\u043e<strong> 0<\/strong>. E\u0441\u043b\u0438 \u043c\u044b \u0437\u0430\u0442\u0435\u043c \u043f\u043e\u0448\u043b\u0435\u043c \u0432 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0443\u044e<strong> M<\/strong> \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435\u00a0<b>\u03c0\/2<\/b>, \u0442\u043e \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u044f\u00a0<b><strong>(sin(M)+M)<span style=\"color: #0000ff;\">\u00f7<\/span>M <\/strong><\/b>\u0431\u0443\u0434\u0435\u0442 \u0440\u0430\u0432\u043d\u043e <strong>1.63662<\/strong>.<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.50.35-PM.png\" rel=\"attachment wp-att-4883\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4883 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.50.35-PM.png\" alt=\"Screen Shot 2016-06-09 at 8.50.35 PM\" width=\"2368\" height=\"1150\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.50.35-PM.png 2368w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.50.35-PM-300x146.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.50.35-PM-768x373.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.50.35-PM-1024x497.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-8.50.35-PM-500x243.png 500w\" sizes=\"auto, (max-width: 2368px) 100vw, 2368px\" \/><\/a><\/p>\n<p>\u041a\u043e\u0434 \u043c\u043e\u0436\u043d\u043e \u043f\u043e\u0441\u043c\u043e\u0442\u0440\u0435\u0442\u044c \u043d\u0430 <strong><a href=\"https:\/\/github.com\/BestKora\/Assignment-2-2016-Calculator\">Github<\/a>\u00a0<\/strong>\u0434\u043b\u044f<strong>\u00a0Xcode 7<\/strong>\u00a0\u0438<strong>\u00a0Swift 2.2<\/strong>.<\/p>\n<p>\u0415\u0441\u043b\u0438 \u0432\u044b \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u043b\u0438\u00a0<strong>Xcode 8<\/strong>, \u0442\u043e \u0434\u043b\u044f\u00a0<strong>Swift 2.3<\/strong>\u00a0\u043a\u043e\u0434\u00a0\u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f\u00a0\u043d\u0430\u00a0<a href=\"https:\/\/github.com\/BestKora\/Swift-2.3-Solution-Spring-2016\"><strong>Github<\/strong><\/a>, \u0430 \u0434\u043b\u044f\u00a0<strong>Swift 3<\/strong>\u00a0&#8212;\u00a0\u0442\u0430\u043a\u0436\u0435 \u043d\u0430<a href=\"https:\/\/github.com\/BestKora\/Swift-3-Solution-Spring-2016\">\u00a0<strong>Github<\/strong><\/a>.<\/p>\n<h2>\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 \u043a\u0430\u043a \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438<\/h2>\n<blockquote>\n<h2><span style=\"font-weight: 400;\">\u0414\u0430\u0436\u0435 \u0435\u0441\u043b\u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0438 <b>API<\/b> \u043a\u043b\u0430\u0441\u0441\u0430 <span style=\"color: #0000ff;\"><b>CalculatorBrain<\/b><\/span> \u0432\u0432\u043e\u0434\u044f\u0442 \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0443\u044e\u201d \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u043c\u0435\u0442\u043e\u0434\u0430 \u0441 \u0438\u043c\u0435\u043d\u0435\u043c <span style=\"color: #0000ff;\"><b>setOperand<\/b><\/span>, \u043d\u0435\u0442 \u043f\u0440\u0438\u0447\u0438\u043d, \u0447\u0442\u043e\u0431\u044b \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u044f\u044f \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445\u201d \u0432 \u043a\u043b\u0430\u0441\u0441\u0435 <span style=\"color: #0000ff;\"><b>CalculatorBrain<\/b><\/span> \u043d\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043b\u0430 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430 \u201c\u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439\u201d, \u0447\u0442\u043e\u0431\u044b \u0437\u0430\u0441\u0442\u0430\u0432\u0438\u0442\u044c \u044d\u0442\u043e \u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c (\u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e, \u044d\u0442\u043e \u0445\u043e\u0440\u043e\u0448\u0430\u044f \u0438\u0434\u0435\u044f, \u0442\u0430\u043a \u043a\u0430\u043a \u0432\u043d\u0443\u0442\u0440\u0438 \u043a\u043b\u0430\u0441\u0441\u0430 <span style=\"color: #0000ff;\"><b>CalculatorBrain<\/b><\/span> \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u0431\u043e\u043b\u044c\u0448\u0430\u044f \u0438\u043d\u0444\u0440\u0430\u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0430 \u0434\u043b\u044f \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u0438\u044f \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044f\u043c\u0438).\u00a0<\/span><\/h2>\n<\/blockquote>\n<p>\u0414\u043e\u0431\u0430\u0432\u043b\u044f\u0435\u043c \u0432<strong><span style=\"color: #0000ff;\"> enum Operation<\/span><\/strong> \u00a0\u0432\u0430\u0440\u0438\u0430\u043d\u0442 \u0434\u043b\u044f \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445, \u043d\u0435 \u0442\u0440\u0435\u0431\u0443\u044e\u0449\u0438\u0439 \u043d\u0438\u043a\u0430\u043a\u0438\u0445 \u0430\u0441\u0441\u043e\u0446\u0438\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0439:<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.31.23-PM.png\" rel=\"attachment wp-att-4886\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4886 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.31.23-PM.png\" alt=\"Screen Shot 2016-06-09 at 9.31.23 PM\" width=\"1196\" height=\"280\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.31.23-PM.png 1196w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.31.23-PM-300x70.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.31.23-PM-768x180.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.31.23-PM-1024x240.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.31.23-PM-500x117.png 500w\" sizes=\"auto, (max-width: 1196px) 100vw, 1196px\" \/><\/a><\/p>\n<p><span style=\"font-weight: 400;\">\u0412 \u044d\u0442\u043e\u043c \u0441\u043b\u0443\u0447\u0430\u0435 \u043c\u0435\u0442\u043e\u0434\u00a0<span style=\"color: #0000ff;\"><b>setOperand<\/b><\/span>, \u0434\u043b\u044f \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445 \u0431\u0443\u0434\u0435\u0442 \u0432\u044b\u0433\u043b\u044f\u0434\u0435\u0442\u044c \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c.<\/span><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.34.11-PM.png\" rel=\"attachment wp-att-4887\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4887 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.34.11-PM.png\" alt=\"Screen Shot 2016-06-09 at 9.34.11 PM\" width=\"1044\" height=\"122\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.34.11-PM.png 1044w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.34.11-PM-300x35.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.34.11-PM-768x90.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.34.11-PM-1024x120.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.34.11-PM-500x58.png 500w\" sizes=\"auto, (max-width: 1044px) 100vw, 1044px\" \/><\/a><\/p>\n<p>\u0414\u043e\u0431\u0430\u0432\u043b\u044f\u0435\u043c \u00a0\u0432 \u0441\u043b\u043e\u0432\u0430\u0440\u044c \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439 <strong><span style=\"color: #0000ff;\">operation<\/span><\/strong> \u0441\u0438\u043c\u0432\u043e\u043b \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 <strong><span style=\"color: #0000ff;\">variable<\/span><\/strong> \u043a\u0430\u043a \u043a\u043b\u044e\u0447, \u0442\u0438\u043f \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438<strong><span style=\"color: #0000ff;\">\u00a0Operation.Variable\u00a0<\/span><\/strong>\u043a\u0430\u043a \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435. \u0418 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u043c \u044d\u0442\u0443 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044e \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u043c\u0435\u0442\u043e\u0434\u0430 <strong><span style=\"color: #0000ff;\">performOperation<\/span><\/strong>, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0432\u043d\u0435\u0441\u0435\u043d\u044b \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u044b\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0434\u043b\u044f\u00a0<strong><span style=\"color: #0000ff;\">Operation.Variable<\/span><\/strong>.<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.47.28-PM.png\" rel=\"attachment wp-att-4888\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4888 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.47.28-PM.png\" alt=\"Screen Shot 2016-06-09 at 9.47.28 PM\" width=\"1060\" height=\"240\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.47.28-PM.png 1060w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.47.28-PM-300x68.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.47.28-PM-768x174.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.47.28-PM-1024x232.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.47.28-PM-500x113.png 500w\" sizes=\"auto, (max-width: 1060px) 100vw, 1060px\" \/><\/a><\/p>\n<p><span style=\"font-weight: 400;\"> \u0415\u0441\u043b\u0438 \u0443 \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439\u201d \u043d\u0435\u0442 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u0432 \u0441\u043b\u043e\u0432\u0430\u0440\u0435, \u0442\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0439\u0442\u0435 <b>0.0<\/b> \u043a\u0430\u043a \u0435\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435:<\/span><br \/>\n<strong><span style=\"color: #0000ff;\">accumulator = variableValues[symbol] ?? 0<\/span><\/strong><br \/>\n\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435\u00a0<strong><span style=\"color: #0000ff;\">var description<\/span><\/strong>\u00a0\u0434\u043e\u043b\u0436\u043d\u043e \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u0442\u044c \u0438\u043c\u044f \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439\u201d (\u0430 \u043d\u0435 \u0435\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435) \u0432\u0441\u044f\u043a\u0438\u0439 \u0440\u0430\u0437, \u043a\u043e\u0433\u0434\u0430 \u0435\u0435 \u0432\u0432\u043e\u0434\u044f\u0442, \u043f\u043e\u044d\u0442\u043e\u043c\u0443<br \/>\n<strong><span style=\"color: #0000ff;\">descriptionAccumulator = symbol<\/span><\/strong><br \/>\n\u0421\u0432\u043e\u0439\u0441\u0442\u0432\u043e\u00a0<span style=\"color: #0000ff;\"><b>var program<\/b><\/span>, \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u043d\u043e\u0435 \u043d\u0430 \u043b\u0435\u043a\u0446\u0438\u0438, \u0432 \u0434\u0430\u043d\u043d\u043e\u043c \u043d\u0435 \u043d\u0443\u0436\u0434\u0430\u0435\u0442\u0441\u044f \u0432 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0438 \u0434\u043b\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0430\u043d\u0438\u044f \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445\u201d, \u0442\u0430\u043a \u043a\u0430\u043a \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0430\u044f \u0432\u044b\u0441\u0442\u0443\u043f\u0430\u0435\u0442 \u043a\u0430\u043a \u043e\u0431\u044b\u0447\u043d\u0430\u044f \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044f<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.53.21-PM.png\" rel=\"attachment wp-att-4889\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4889 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.53.21-PM.png\" alt=\"Screen Shot 2016-06-09 at 9.53.21 PM\" width=\"1062\" height=\"518\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.53.21-PM.png 1062w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.53.21-PM-300x146.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.53.21-PM-768x375.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.53.21-PM-1024x499.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2016\/06\/Screen-Shot-2016-06-09-at-9.53.21-PM-500x244.png 500w\" sizes=\"auto, (max-width: 1062px) 100vw, 1062px\" \/><\/a><\/p>\n<p>\u041e\u0441\u0442\u0430\u043b\u044c\u043d\u044b\u0435 \u043f\u0443\u043d\u043a\u0442\u044b \u0417\u0430\u0434\u0430\u043d\u0438\u044f 2 \u0430\u0431\u0441\u043e\u043b\u044e\u0442\u043d\u043e \u0438\u0434\u0435\u043d\u0442\u0438\u0447\u043d\u044b \u0442\u043e\u043c\u0443, \u0447\u0442\u043e \u0438\u0437\u043b\u043e\u0436\u0435\u043d\u043e \u0432\u044b\u0448\u0435.<br \/>\n\u041a\u043e\u0434 \u043c\u043e\u0436\u043d\u043e \u043f\u043e\u0441\u043c\u043e\u0442\u0440\u0435\u0442\u044c \u043d\u0430 <strong><a href=\"https:\/\/github.com\/BestKora\/Assignment-2-2016-Calculator-PerformOperation\">Github<\/a>\u00a0<\/strong>\u0434\u043b\u044f<strong>\u00a0Xcode 7<\/strong>\u00a0\u0438<strong>\u00a0Swift 2.2<\/strong>.<\/p>\n<p>\u0415\u0441\u043b\u0438 \u0432\u044b \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u043b\u0438\u00a0<strong>Xcode 8<\/strong>, \u0442\u043e \u0434\u043b\u044f\u00a0<strong>Swift 2.3<\/strong>\u00a0\u043a\u043e\u0434\u00a0\u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f\u00a0\u043d\u0430\u00a0<a href=\"https:\/\/github.com\/BestKora\/Swift-2.3-Solution-Spring-2016\"><strong>Github<\/strong><\/a>, \u0430 \u0434\u043b\u044f\u00a0<strong>Swift 3<\/strong>\u00a0&#8212;\u00a0\u0442\u0430\u043a\u0436\u0435 \u043d\u0430<a href=\"https:\/\/github.com\/BestKora\/Swift-3-Solution-Spring-2016\">\u00a0<strong>Github<\/strong><\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0421\u043e\u0434\u0435\u0440\u0436\u0430\u043d\u0438\u0435 \u0422\u0435\u043a\u0441\u0442 \u0414\u043e\u043c\u0430\u0448\u043d\u0435\u0433\u043e \u0417\u0430\u0434\u0430\u043d\u0438\u044f 2 \u043d\u0430 \u0430\u043d\u0433\u043b\u0438\u0439\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435 \u0434\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043d\u0430\u00a0\u00a0iTunes \u0432 \u043f\u0443\u043d\u043a\u0442\u0435 \u201cProgramming: Project 2: Calculator Brain\u2033.\u00a0\u041d\u0430 \u0440\u0443\u0441\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435 \u0432\u044b \u043c\u043e\u0436\u0435\u0442\u0435 \u0441\u043a\u0430\u0447\u0430\u0442\u044c \u0437\u0434\u0435\u0441\u044c: \u0417\u0430\u0434\u0430\u043d\u0438\u0435 2 \u0440\u0430\u0441\u0448\u0438\u0440\u044f\u0435\u0442 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438\u00a0\u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440\u0430\u00a0Calculator\u00a0\u0438\u0437 \u0417\u0430\u0434\u0430\u043d\u0438\u044f 1, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044f \u0435\u043c\u0443 \u0432\u0432\u043e\u0434\u0438\u0442\u044c \u201c\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0435\u201d \u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0442\u044c \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044e\u00a0Undo. \u041a\u0440\u043e\u043c\u0435 \u0442\u043e\u0433\u043e, \u0432\u0430\u043c \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e &hellip; <a href=\"https:\/\/bestkora.com\/IosDeveloper\/zadanie-2-cs193p-spring-2016-umnyj-kalkulyator-reshenie\/\">\u0427\u0438\u0442\u0430\u0442\u044c \u0434\u0430\u043b\u0435\u0435 <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28,34,14],"tags":[29,31,30],"class_list":["post-4843","post","type-post","status-publish","format-standard","hentry","category-ios-9","category-stanford-cs-193p-ios-9","category-swift","tag-ios-9","tag-swift","tag-domashnee-zadanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.8 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d 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\u043a\u0443\u0440\u0441\u043e\u0432 CS 193P Spring 2016 &quot;\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0430 iOS 9 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u043d\u0430 Swift&quot;\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/bestkora.com\\\/IosDeveloper\\\/zadanie-2-cs193p-spring-2016-umnyj-kalkulyator-reshenie\\\/#article\",\"name\":\"\\u0417\\u0430\\u0434\\u0430\\u043d\\u0438\\u0435 2 cs193p Spring 2016 \\\"\\u0423\\u043c\\u043d\\u044b\\u0439\\\" \\u041a\\u0430\\u043b\\u044c\\u043a\\u0443\\u043b\\u044f\\u0442\\u043e\\u0440. \\u0420\\u0435\\u0448\\u0435\\u043d\\u0438\\u0435. \\u041e\\u0431\\u044f\\u0437\\u0430\\u0442\\u0435\\u043b\\u044c\\u043d\\u044b\\u0435 \\u0438 \\u0434\\u043e\\u043f\\u043e\\u043b\\u043d\\u0438\\u0442\\u0435\\u043b\\u044c\\u043d\\u044b\\u0435 \\u043f\\u0443\\u043d\\u043a\\u0442\\u044b. | 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