{"id":2760,"date":"2015-03-30T08:32:13","date_gmt":"2015-03-30T08:32:13","guid":{"rendered":"http:\/\/bestkora.com\/IosDeveloper\/?p=2760"},"modified":"2016-06-09T19:36:39","modified_gmt":"2016-06-09T19:36:39","slug":"zadanie-2-reshenie-vozvrashhaem-enum-result-dopolnitelnye-punkty-2-3-swift-1-2-i-swift-2-0","status":"publish","type":"post","link":"https:\/\/bestkora.com\/IosDeveloper\/zadanie-2-reshenie-vozvrashhaem-enum-result-dopolnitelnye-punkty-2-3-swift-1-2-i-swift-2-0\/","title":{"rendered":"\u0417\u0430\u0434\u0430\u043d\u0438\u0435 2. \u0420\u0435\u0448\u0435\u043d\u0438\u0435 &#8212;  \u0412\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u043c enum Result (\u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u043f\u0443\u043d\u043a\u0442\u044b 2, 3) Swift 1.2  \u0438 Swift 2.0"},"content":{"rendered":"<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-5.32.05-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-1733 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-5.32.05-PM.png\" alt=\"Screen Shot 2015-03-31 at 5.32.05 PM\" width=\"1682\" height=\"968\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-5.32.05-PM.png 1682w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-5.32.05-PM-300x173.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-5.32.05-PM-1024x589.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-5.32.05-PM-500x288.png 500w\" sizes=\"auto, (max-width: 1682px) 100vw, 1682px\" \/><\/a><br \/>\n\u0422\u0435\u043a\u0441\u0442 \u0414\u043e\u043c\u0430\u0448\u043d\u0435\u0433\u043e \u0437\u0430\u0434\u0430\u043d\u0438\u044f \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<strong><span style=\"color: #373737;\">\u00a0<\/span><a style=\"color: #1982d1;\" title=\"Developing iOS 7 Apps: Assignment 1\" href=\"https:\/\/itunes.apple.com\/us\/course\/developing-ios-8-apps-swift\/id961180099\" target=\"_blank\">iTunes \u0432 \u043f\u0443\u043d\u043a\u0442\u0435 \u201cDeveloping iOS 8 app: Programming: Project 2\u2033<\/a><\/strong><span style=\"color: #373737;\">. \u00a0\u0422\u0435\u043a\u0441\u0442 \u0414\u043e\u043c\u0430\u0448\u043d\u0435\u0433\u043e \u0437\u0430\u0434\u0430\u043d\u0438\u044f \u043d\u0430\u00a0\u0440\u0443\u0441\u0441\u043a\u043e\u043c\u00a0\u00a0\u044f\u0437\u044b\u043a\u0435 \u0434\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043d\u0430 <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\/0B0jZOSo2e4NmNW5OWHRhN2FkY0E\/view?usp=drivesdk\" target=\"&quot;_blank&quot;\">\u0417\u0430\u0434\u0430\u043d\u0438\u0435 2 iOS 8_new.pdf<\/a><\/span><\/p>\u0420\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0437\u0430\u0434\u0430\u043d\u0438\u044f \u043c\u043e\u0436\u043d\u043e \u043e\u0431\u0441\u0443\u0436\u0434\u0430\u0442\u044c \u043d\u0430 \u0444\u043e\u0440\u0443\u043c\u0435\u00a0<strong><a href=\"https:\/\/groups.google.com\/forum\/?hl=ru#!forum\/swiftru\">Swift[ru]<\/a><\/strong>\u00a0. \u0412\u0430\u0448\u0435 \u0440\u0435\u0448\u0435\u043d\u0438\u0435 \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u043b\u0443\u0447\u0448\u0435 \u0438 \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u0435\u0435. \u0412\u044b\u043a\u043b\u0430\u0434\u044b\u0432\u0430\u0439\u0442\u0435 \u0435\u0433\u043e \u0432<strong>\u00a0Github<\/strong>,\u00a0\u0434\u0430\u0432\u0430\u0439\u0442\u0435 \u0441\u0441\u044b\u043b\u043a\u0443 \u043d\u0430\u00a0<strong>Dropbox<\/strong>\u00a0\u0438\u043b\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0439\u0442\u0435 \u0434\u0440\u0443\u0433\u0438\u0435 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0432\u0435\u0440\u0441\u0438\u044f\u043c\u0438.\u00a0<strong>Xcode<\/strong>\u00a0\u00a0\u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442 \u043d\u0430\u043f\u0440\u044f\u043c\u0443\u044e \u0441\u00a0<strong>Github.<\/strong><\/span><\/p>\n<p>\u042d\u0442\u043e \u043e\u043a\u043e\u043d\u0447\u0430\u043d\u0438\u0435 \u0440\u0435\u0448\u0435\u043d\u0438\u044f \u0417\u0430\u0434\u0430\u043d\u0438\u044f 2- \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u043f\u0443\u043d\u043a\u0442\u044b 2 \u0438 3, \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0438\u0435 \u043f\u0443\u043d\u043a\u0442\u044b \u043c\u043e\u0436\u043d\u043e \u043f\u043e\u0441\u043c\u043e\u0442\u0440\u0435\u0442\u044c:<\/p>\n<p><strong><a href=\"https:\/\/bestkora.com\/IosDeveloper\/zadanie-2-reshenie-nachalo-obyazatelnye-punkty-1-4-swift-1-2-i-swift-2-0\/\">\u0417\u0430\u0434\u0430\u043d\u0438\u0435 2. \u0420\u0435\u0448\u0435\u043d\u0438\u0435 &#8212; \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u043f\u0443\u043d\u043a\u0442\u044b 1-4.\u00a0<\/a><\/strong><\/p>\n<p><strong><a title=\"\u0417\u0430\u0434\u0430\u043d\u0438\u0435 2. \u0420\u0435\u0448\u0435\u043d\u0438\u0435 \u2014 \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0435\u043d\u0438\u0435 (\u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u043f\u0443\u043d\u043a\u0442\u044b 5-8)\" href=\"https:\/\/bestkora.com\/IosDeveloper\/zadanie-2-reshenie-prodolzhenie-obyazatelnye-punkty-5-8-swift-1-2-i-swift-2-0\/\">\u0417\u0430\u0434\u0430\u043d\u0438\u0435 2. \u0420\u0435\u0448\u0435\u043d\u0438\u0435 &#8212; \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u043f\u0443\u043d\u043a\u0442\u044b 5-8.<\/a>\u00a0<\/strong><\/p>\n<p><strong><a title=\"\u0417\u0430\u0434\u0430\u043d\u0438\u0435 2. \u0420\u0435\u0448\u0435\u043d\u0438\u0435 \u2014 \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0435\u043d\u0438\u0435 (\u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u043f\u0443\u043d\u043a\u0442\u044b 9-12)\" href=\"https:\/\/bestkora.com\/IosDeveloper\/zadanie-2-reshenie-prodolzhenie-obyazatelnye-punkty-9-12-swift-1-2-i-swift-2-0\/\">\u0417\u0430\u0434\u0430\u043d\u0438\u0435 2. \u0420\u0435\u0448\u0435\u043d\u0438\u0435 &#8212; \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u043f\u0443\u043d\u043a\u0442\u044b 9-12.<\/a>\u00a0<\/strong><\/p>\n<p><strong><a title=\"\u0417\u0430\u0434\u0430\u043d\u0438\u0435 2. \u0420\u0435\u0448\u0435\u043d\u0438\u0435 \u2014 \u0423\u0431\u0438\u0440\u0430\u0435\u043c \u043b\u0438\u0448\u043d\u0438\u0435 \u0441\u043a\u043e\u0431\u043a\u0438 (\u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u043f\u0443\u043d\u043a\u0442 1)\" href=\"https:\/\/bestkora.com\/IosDeveloper\/zadanie-2-reshenie-ubiraem-lishnie-skobki-dopolnitelnyj-punkt-1-swift-1-2-i-swift-2-0\/\">\u0417\u0430\u0434\u0430\u043d\u0438\u0435 2. \u0420\u0435\u0448\u0435\u043d\u0438\u0435 &#8212; \u0423\u0431\u0438\u0440\u0430\u0435\u043c \u043b\u0438\u0448\u043d\u0438\u0435 \u0441\u043a\u043e\u0431\u043a\u0438. \u0414\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u043f\u0443\u043d\u043a\u0442 1.<\/a>\u00a0<\/strong><\/p>\n<p>\u041e\u043a\u043e\u043d\u0447\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439<strong>\u00a0\u0432\u0430\u0440\u0438\u0430\u043d\u0442 \u043a\u043e\u0434\u0430<\/strong>\u00a0(\u0432\u043a\u043b\u044e\u0447\u0430\u044f \u0432\u0441\u0435 \u043e\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) \u0434\u043b\u044f\u00a0<strong>\u0417\u0430\u0434\u0430\u043d\u0438\u044f 2<\/strong>\u00a0\u00a0\u043c\u043e\u0436\u043d\u043e \u043d\u0430\u0439\u0442\u0438\u00a0\u043d\u0430<strong>\u00a0<a href=\"https:\/\/github.com\/BestKora\/Calculator-cs193p-Winter-2015-Assigment-2\/tree\/Extra2-3Correct\">Github<\/a>,\u00a0<\/strong>\u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u043f\u0430\u0442\u0442\u0435\u0440\u043d\u0430 \u043f\u0440\u043e\u0435\u043a\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f\u00a0<strong>Singleton<\/strong>\u00a0\u0434\u043b\u044f\u00a0<strong>NSNumberFormatter\u00a0<\/strong>\u043c\u043e\u0436\u043d\u043e \u043f\u043e\u0441\u043c\u043e\u0442\u0440\u0435\u0442\u044c \u0432 \u043f\u043e\u0441\u0442\u0435<\/p>\n<p><strong><a title=\"\u041a\u0430\u043a \u0441\u043e\u0437\u0434\u0430\u0442\u044c NSNumberFormatter Singleton \u0432 Swift (1.2 \u0438 1.1) \u2014 \u0434\u043e\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u043a \u0417\u0430\u0434\u0430\u043d\u0438\u044e 2\" href=\"https:\/\/bestkora.com\/IosDeveloper\/kak-sozdat-nsnumberformatter-singleton-v-swift\/\">\u041a\u0430\u043a \u0441\u043e\u0437\u0434\u0430\u0442\u044c NSNumberFormatter Singleton \u0432 Swift (1.2 \u00a0\u0438 1.1) &#8212; \u00a0\u0434\u043e\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u043a \u0417\u0430\u0434\u0430\u043d\u0438\u044e 2<\/a>,<\/strong>\u00a0\u0430 \u043a\u043e\u0434 \u043d\u0430\u00a0<strong><a href=\"https:\/\/github.com\/BestKora\/CalculatorBrain-cs193p-2015-2\/tree\/Assignment2Singleton\">Github<\/a>.\u00a0<\/strong><\/p>\n<h2>\u041f\u0443\u043d\u043a\u0442 2 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439<\/h2>\n<blockquote><p><strong>\u0414\u043e\u0431\u0430\u0432\u044c\u0442\u0435 \u201cUndo\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\u201cbackspace\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 \u201cbackspace\u201d \u0438 \u0440\u0435\u0430\u043b\u044c\u043d\u043e\u0433\u043e \u201cUndo\u201d \u0432 \u0435\u0434\u0438\u043d\u0441\u0442\u0432\u0435\u043d\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\u201cbackspace\u201d. \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 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0442\u044c\u0441\u044f Undo \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 CalculatorBrain. \u00a0 \u00a0\u00a0<\/strong><\/p><\/blockquote>\n<p><!--more--><\/p>\n<p>\u0414\u043e\u0431\u0430\u0432\u043b\u044f\u0435\u043c \u0432 API \u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440\u0430 \u043d\u043e\u0432\u044b\u0439 \u043c\u0435\u0442\u043e\u0434<\/p>\n<p>[js]<br \/>\n   func popStack() -&amp;gt; Double? {<br \/>\n        if !opStack.isEmpty {<br \/>\n            opStack.removeLast()<br \/>\n        }<br \/>\n        return evaluate()<br \/>\n    }<br \/>\n[\/js]<\/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\/2015\/03\/Screen-Shot-2015-08-24-at-9.51.52-AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2757 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-08-24-at-9.51.52-AM.png\" alt=\"Screen Shot 2015-08-24 at 9.51.52 AM\" width=\"996\" height=\"308\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-08-24-at-9.51.52-AM.png 996w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-08-24-at-9.51.52-AM-300x93.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-08-24-at-9.51.52-AM-500x155.png 500w\" sizes=\"auto, (max-width: 996px) 100vw, 996px\" \/><\/a><br \/>\n\u041a\u043e\u0434 \u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f \u043d\u0430\u00a0<strong><a href=\"https:\/\/github.com\/BestKora\/Calculator-cs193p-Winter-2015-Assigment-2\/tree\/Extra2\">Github<\/a><\/strong>.<\/p>\n<h2>\u041f\u0443\u043d\u043a\u0442 3 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439<\/h2>\n<blockquote><p>\u0414\u043e\u0431\u0430\u0432\u044c\u0442\u0435 \u043d\u043e\u0432\u044b\u0439 \u043c\u0435\u0442\u043e\u0434, \u00a0<b>evaluateAndReportErrors()<\/b>. \u00a0\u041e\u043d \u0434\u043e\u043b\u0436\u0435\u043d \u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c \u043a\u0430\u043a\u00a0<b>evaluate()\u00a0<\/b>\u0437\u0430 \u0438\u0441\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435\u043c \u0442\u043e\u0433\u043e, \u0447\u0442\u043e \u0435\u0441\u043b\u0438 \u0432\u043e\u0437\u043d\u0438\u043a\u0430\u044e\u0442 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0441 \u043e\u0446\u0435\u043d\u043a\u043e\u0439 \u0441\u0442\u044d\u043a\u0430 (\u043d\u0435 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u044b \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445 \u0438\u043b\u0438 \u043f\u0440\u043e\u043f\u0443\u0449\u0435\u043d\u044b \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u044b, \u0434\u0435\u043b\u0435\u043d\u0438\u0435 \u043d\u0430 0, \u043a\u0432\u0430\u0434\u0440\u0430\u0442\u043d\u044b\u0439 \u043a\u043e\u0440\u0435\u043d\u044c \u0438\u0437 \u043e\u0442\u0440\u0438\u0446\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u0447\u0438\u0441\u043b\u0430 \u0438 \u0442.\u0434.), \u0442\u043e \u0432\u043c\u0435\u0441\u0442\u043e \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0435\u043d\u0438\u044f\u00a0<strong><span style=\"color: #0000ff;\">nil<\/span><\/strong>, \u043e\u043d \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442\u00a0<strong><span style=\"color: #0000ff;\">String<\/span><\/strong>\u00a0\u0441 \u0442\u0435\u043c, \u0447\u0442\u043e \u0441\u043e\u0431\u043e\u0439\u00a0\u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430\u00a0(\u0435\u0441\u043b\u0438 \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u043c\u043d\u043e\u0433\u043e, \u0442\u043e \u0432\u044b \u043c\u043e\u0436\u0435\u0442\u0435 \u0432\u0435\u0440\u043d\u0443\u0442\u044c \u043b\u044e\u0431\u0443\u044e \u0438\u0437 \u043d\u0438\u0445, \u043d\u043e \u043e\u0434\u043d\u0443). \u041f\u043e\u043a\u0430\u0436\u0438\u0442\u0435 \u0432\u0441\u0435 \u0442\u0430\u043a\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 \u043d\u0430\u00a0<b>display\u00a0<\/b>\u0432\u0430\u0448\u0435\u0433\u043e \u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440\u0430 (\u0432\u043c\u0435\u0441\u0442\u043e \u0442\u043e\u0433\u043e, \u0447\u0442\u043e\u0431\u044b \u0434\u0435\u043b\u0430\u0442\u044c \u0435\u0433\u043e \u043f\u0443\u0441\u0442\u044b\u043c \u0438\u043b\u0438 \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u0442\u044c \u043a\u0430\u043a\u0438\u0435-\u0442\u043e \u0441\u0442\u0440\u0430\u043d\u043d\u044b\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f). \u0412\u044b \u0432\u0441\u0435 \u0440\u0430\u0432\u043d\u043e \u0434\u043e\u043b\u0436\u043d\u044b \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u0442\u044c\u00a0<b>evaluate()\u00a0<\/b>\u043a\u0430\u043a \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u043e \u0432 \u041e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u043f\u0443\u043d\u043a\u0442\u0430\u0445 \u0437\u0430\u0434\u0430\u043d\u0438\u044f, \u043d\u043e \u0435\u0441\u043b\u0438 \u0445\u043e\u0442\u0438\u0442\u0435, \u0443 \u0432\u0430\u0441 \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c\u00a0<b>evaluate() ,\u00a0<\/b>\u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u044e\u0449\u0438\u0439<b>\u00a0nil<\/b>, \u0435\u0441\u043b\u0438 \u0438\u043c\u0435\u043b\u0438 \u043c\u0435\u0441\u0442\u043e \u043b\u044e\u0431\u044b\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 ( \u043d\u0435 \u043f\u0440\u043e\u0441\u0442\u043e \u201c\u043d\u0435 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u043e \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435\u201d \u0438\u043b\u0438 \u201c\u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u043e\u0432\u201d). \u00a0\u041c\u0435\u0442\u043e\u0434\u044b\u00a0<b>push<\/b>\u00a0\u0438\u00a0<b>perform<\/b>\u00a0\u0432\u0441\u0435 \u0435\u0449\u0435 \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u044e\u0442\u00a0<b>Double?<\/b>\u00a0(\u044d\u0442\u043e \u0441\u0432\u043e\u0435\u0433\u043e \u0440\u043e\u0434\u0430 \u201c\u043f\u0443\u0441\u0442\u0430\u044f\u201d \u043e\u0446\u0435\u043d\u043a\u0430, \u043d\u043e \u043c\u044b \u0445\u043e\u0442\u0438\u043c \u0438\u043c\u0435\u0442\u044c \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0434\u0430\u0442\u044c \u0437\u0430\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u043f\u043e \u0432\u0430\u0448\u0438\u043c \u041e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u043c \u0438 \u0414\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u043c \u043f\u0443\u043d\u043a\u0442\u0430\u043c \u0417\u0430\u0434\u0430\u043d\u0438\u044f \u0440\u0430\u0437\u0434\u0435\u043b\u044c\u043d\u043e).<strong>\u00a0 \u00a0\u00a0<\/strong><\/p><\/blockquote>\n<p>\u0418\u0434\u0435\u043c \u0441\u0442\u0440\u043e\u0433\u043e \u043f\u043e \u043f\u043e\u0434\u0441\u043a\u0430\u0437\u043a\u0430\u043c \u0434\u043b\u044f \u044d\u0442\u043e\u0433\u043e \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u043f\u0443\u043d\u043a\u0442\u0430 \u0437\u0430\u0434\u0430\u043d\u0438\u044f.<\/p>\n<ul>\n<li><strong>\u041a\u0430\u043a\u0430\u044f \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0430 \u0434\u0430\u043d\u043d\u044b\u0445 \u043f\u0440\u0435\u043a\u0440\u0430\u0441\u043d\u043e \u043f\u043e\u0434\u0445\u043e\u0434\u0438\u0442 \u0434\u043b\u044f \u0441\u0438\u0442\u0443\u0430\u0446\u0438\u0438 \u201c\u0438\u043b\u0438- \u0438\u043b\u0438\u201d \u0438 \u043a\u043e\u0442\u043e\u0440\u0443\u044e \u043c\u044b \u0443\u0436\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043b\u0438?<\/strong><\/li>\n<\/ul>\n<p>\u041c\u044b \u0437\u043d\u0430\u0435\u043c, \u0447\u0442\u043e \u0432 \u044d\u0442\u043e\u043c \u0441\u043b\u0443\u0447\u0430\u0435 \u043d\u0443\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u043f\u0435\u0440\u0435\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0435\u00a0<strong><span style=\"color: #0000ff;\">enum<\/span><\/strong>\u00a0\u0438 \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u0435\u0442\u0441\u044f \u0432\u00a0<strong><span style=\"color: #0000ff;\">CalculatorBrain<\/span><\/strong>\u00a0\u043f\u0435\u0440\u0435\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0435\u00a0<strong><span style=\"color: #0000ff;\">enum<\/span><span style=\"color: #0000ff;\">\u00a0Result<\/span><\/strong><\/p>\n<p>[js]<br \/>\n    \/\/ enum Resul &#8212; \u043b\u0438\u0431\u043e \u0434\u043b\u044f \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u0441\u0442\u044d\u043a\u0430, \u043b\u0438\u0431\u043e \u0434\u043b\u044f \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u044f \u043e\u0431 \u043e\u0448\u0438\u0431\u043a\u0435<br \/>\n    \/\/ public, \u0442\u0430\u043a \u043a\u0430\u043a \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f ViewController \u0434\u043b\u044f \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u0438\u044f \u043e\u0446\u0435\u043d\u043a\u0438 \u0441\u0442\u044d\u043a\u0430<br \/>\n    enum Result {<br \/>\n        case Value(Double)<br \/>\n        case Error(String)<br \/>\n    }<br \/>\n[\/js]<\/p>\n<p>\u042d\u0442\u043e \u043e\u0431\u0449\u0438\u0439 \u043f\u043e\u0434\u0445\u043e\u0434 \u043a \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u0448\u0438\u0431\u043e\u043a \u0432 \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u0445 \u044f\u0437\u044b\u043a\u0430\u0445 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0442\u0438\u043f\u0430\u00a0<strong>Haskel<\/strong>\u00a0\u0438\u043b\u0438\u00a0<strong>Scala<\/strong>, \u0430 \u0442\u0435\u043f\u0435\u0440\u044c \u0438 \u0432\u00a0<strong>Swift<\/strong>. \u0412 \u043e\u0431\u0449\u0435\u043c \u0441\u043b\u0443\u0447\u0430\u0435 \u0442\u0438\u043f\u00a0<strong><span style=\"color: #0000ff;\">enum Result<\/span><\/strong>\u00a0\u0432\u044b\u0433\u043b\u044f\u0434\u0438\u0442 \u0431\u043e\u043b\u0435\u0435 \u043e\u0431\u043e\u0431\u0449\u0435\u043d\u043d\u044b\u043c (<strong>generic<\/strong>)<\/p>\n<p>[js]<br \/>\nenum Result&amp;lt;A&amp;gt; {<br \/>\n  case Value(A)<br \/>\n  case Error(NSError)<br \/>\n}<br \/>\n[\/js]<\/p>\n<p>\u041d\u043e \u043c\u044b \u0431\u0443\u0434\u0435\u043c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0431\u043e\u043b\u0435\u0435 \u043f\u0440\u043e\u0441\u0442\u043e\u0439 \u0432\u0430\u0440\u0438\u0430\u043d\u0442: \u0443\u0441\u043f\u0435\u0448\u043d\u044b\u0439 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u043e\u0446\u0435\u043d\u043a\u0438 \u0441\u0442\u044d\u043a\u0430 &#8212;\u00a0<strong><span style=\"color: #0000ff;\">Double<\/span><\/strong>, \u043e\u0448\u0438\u0431\u043a\u0430 \u043d\u0430 \u043b\u044e\u0431\u043e\u043c \u044d\u0442\u0430\u043f\u0435 \u043e\u0446\u0435\u043d\u043a\u0438 &#8212;\u00a0<strong><span style=\"color: #0000ff;\">String<\/span><\/strong>.<\/p>\n<ul>\n<li><strong>\u0421\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0435 \u043e\u0431 \u043e\u0448\u0438\u0431\u043a\u0430\u0445 \u043d\u0435 \u0434\u043e\u043b\u0436\u043d\u043e \u0432\u043b\u0438\u044f\u0442\u044c \u043d\u0430 \u0432\u0430\u0448 \u00a0<span style=\"color: #0000ff;\">description<\/span>.<\/strong><\/li>\n<\/ul>\n<p>\u041d\u0430\u043c \u043d\u0435 \u0442\u0440\u0435\u0431\u0443\u0435\u0442\u0441\u044f \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0441\u0442\u044d\u043a\u0430 \u0432 \u0438\u043d\u0444\u0438\u043a\u0441\u043d\u043e\u0439 \u0444\u043e\u0440\u043c\u0435, \u043d\u0430\u043c \u043d\u0443\u0436\u043d\u043e \u0442\u043e\u043b\u044c\u043a\u043e \u043e\u0446\u0435\u043d\u0438\u0432\u0430\u0442\u044c \u0441\u0442\u044d\u043a \u0438 &#171;\u043b\u043e\u0432\u0438\u0442\u044c \u043e\u0448\u0438\u0431\u043a\u0438&#187;, \u043f\u043e\u044d\u0442\u043e\u043c\u0443 \u0441\u043e\u0437\u0434\u0430\u0434\u0438\u043c \u0434\u0432\u0435 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 &#8212; \u043e\u0434\u043d\u0443\u00a0<strong>non-private<\/strong>, \u0430 \u0434\u0440\u0443\u0433\u0443\u044e\u00a0<strong>private<\/strong><\/p>\n<p>[js]<br \/>\nfunc evaluateAndReportErrors() -&amp;gt; Result &amp;nbsp;<br \/>\nprivate func evaluateResult(ops: [Op]) -&amp;gt; (result: Result, remainingOps: [Op])<br \/>\n[\/js]<\/p>\n<p>\u043d\u0430 \u043f\u043e\u0434\u043e\u0431\u0438\u0435 \u043f\u0430\u0440\u044b \u0444\u0443\u043d\u043a\u0446\u0438\u0439<\/p>\n<p>[js]<br \/>\nfunc evaluate() -&amp;gt; Double?<br \/>\nprivate func evaluate(ops: [Op]) -&amp;gt; (result: Double?, remainingOps: [Op])<br \/>\n[\/js]<\/p>\n<p>\u0422\u043e\u043b\u044c\u043a\u043e<strong><span style=\"color: #0000ff;\">\u00a0evaluate()<\/span><\/strong>\u00a0 \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442 \u00a0<strong><span style=\"color: #0000ff;\">Double?<\/span><\/strong>, \u0430\u00a0<strong><span style=\"color: #0000ff;\">evaluateAndReportErrors()\u00a0<\/span><\/strong>\u00a0\u0431\u0443\u0434\u0435\u0442 \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0442\u044c\u00a0<strong><span style=\"color: #0000ff;\">Result<\/span><\/strong>\u00a0.<\/p>\n<ul>\n<li><strong>\u041d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e, \u0447\u0442\u043e\u0431\u044b \u00a0<span style=\"color: #0000ff;\">evaluateAndReportErrors()<\/span>\u00a0\u0443\u043c\u0435\u043b\u0430 \u0441\u043f\u0440\u0430\u0448\u0438\u0432\u0430\u0442\u044c \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438\u00a0<span style=\"color: #0000ff;\">BinaryOperation<\/span>\u00a0\u0438\u00a0<span style=\"color: #0000ff;\">UnaryOperation<\/span>, \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).<\/strong><\/li>\n<\/ul>\n<p>\u0412 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0445 \u0434\u0432\u0443\u0445 \u043f\u0443\u043d\u043a\u0442\u0430\u0445 \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u0435\u0442\u0441\u044f \u0440\u0435\u0448\u0435\u043d\u0438\u0435, \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u043c\u044b \u0438 \u0432\u043e\u0437\u044c\u043c\u0435\u043c \u043d\u0430 \u0432\u043e\u043e\u0440\u0443\u0436\u0435\u043d\u0438\u0435.<\/p>\n<ul>\n<li>\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 \u0430\u0441\u0441\u043e\u0446\u0438\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u0434\u043b\u044f<strong>\u00a0<span style=\"color: #0000ff;\">BinaryOperation<\/span><\/strong>\u00a0\u0438<strong>\u00a0<span style=\"color: #0000ff;\">UnaryOperation<\/span>\u00a0<\/strong>, \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). \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<strong>\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<\/strong><\/li>\n<\/ul>\n<ul>\n<li>\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. \u0412\u0430\u043c \u043d\u0443\u0436\u043d\u043e \u043e\u0431\u043b\u0435\u0433\u0447\u0438\u0442\u044c \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u0435 \u0442\u0430\u043a\u0438\u0445 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439. \u0415\u0441\u043b\u0438 \u0432\u044b \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043b\u0438 \u043f\u043e\u0434\u0441\u043a\u0430\u0437\u043a\u0443, \u043f\u0440\u0438\u0432\u0435\u0434\u0435\u043d\u043d\u0443\u044e \u0432\u044b\u0448\u0435, \u0442\u043e \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0430 \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, \u0431\u0443\u0434\u0435\u0442 \u043d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u043f\u0440\u043e\u0441\u0442\u044b\u043c \u0441\u043f\u043e\u0441\u043e\u0431\u043e\u043c \u0441\u0434\u0435\u043b\u0430\u0442\u044c \u044d\u0442\u043e. \u0412\u044b \u043c\u043e\u0436\u0435\u0442\u0435 \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<span style=\"color: #0000ff;\">String?<\/span>.<\/strong><\/li>\n<\/ul>\n<p>\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><span style=\"color: #000000;\">\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\u00a0<span style=\"color: #0000ff;\"><span style=\"color: #000000;\">\u0432\u0438\u0434\u0435 \u0442\u0438\u043f\u0430<\/span>\u00a0<\/span>\u0442\u0435\u0441\u0442\u0438\u0440\u0443\u044e\u0449\u0435\u0439 \u0444\u0443\u043d\u043a\u0446\u0438\u0438<span style=\"color: #0000ff;\">\u00a0<\/span><\/span><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-12.22.38-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-1711 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-12.22.38-PM.png\" alt=\"Screen Shot 2015-03-31 at 12.22.38 PM\" width=\"982\" height=\"248\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-12.22.38-PM.png 982w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-12.22.38-PM-300x76.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-12.22.38-PM-500x126.png 500w\" sizes=\"auto, (max-width: 982px) 100vw, 982px\" \/><\/a><br \/>\n\u0412 \u043d\u0430\u0448\u0435\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0442\u043e\u043b\u044c\u043a\u043e \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438\u00a0<strong><span style=\"color: #0000ff;\">\u00f7<\/span><\/strong>\u00a0\u0438\u00a0<strong><span style=\"color: #0000ff;\">\u00a0\u221a<\/span><\/strong>\u00a0\u043f\u043e\u043b\u0443\u0447\u0430\u044e\u0442 &#171;\u0442\u0435\u0441\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435&#187; \u0444\u0443\u043d\u043a\u0446\u0438\u0438<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-12.52.03-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-1714 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-12.52.03-PM.png\" alt=\"Screen Shot 2015-03-31 at 12.52.03 PM\" width=\"976\" height=\"472\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-12.52.03-PM.png 976w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-12.52.03-PM-300x145.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-12.52.03-PM-500x242.png 500w\" sizes=\"auto, (max-width: 976px) 100vw, 976px\" \/><\/a><br \/>\n\u0412 \u043c\u0435\u0442\u043e\u0434\u0435\u00a0\u00a0<strong><span style=\"color: #0000ff;\">evaluateResult<\/span><\/strong><span style=\"color: #0000ff;\"><span style=\"color: #000000;\">\u00a0\u0440\u0435\u043a\u0443\u0440\u0441\u0438\u0432\u043d\u043e \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u043c \u0441\u043e \u0441\u0442\u044d\u043a\u043e\u043c \u0438 \u043f\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\u00a0<strong><span style=\"color: #0000ff;\">Result.Error<\/span>\u00a0<\/strong>\u00a0\u0438 \u043f\u0440\u0435\u043a\u0440\u0430\u0449\u0430\u0435\u043c \u0440\u0435\u043a\u0443\u0440\u0441\u0438\u044e. \u0415\u0441\u043b\u0438 \u0443 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438\u00a0<strong><span style=\"color: #0000ff;\">Variable<\/span><\/strong>\u00a0\u043d\u0435 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u043e \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435, \u0442\u043e \u0442\u0430\u043a\u0436\u0435\u00a0\u0444\u0438\u043a\u0441\u0438\u0440\u0443\u0435\u043c \u043e\u0448\u0438\u0431\u043a\u0443 \u0432\u00a0<strong><span style=\"color: #0000ff;\">Result.Error<\/span>\u00a0<\/strong>\u00a0\u0438 \u043f\u0440\u0435\u043a\u0440\u0430\u0449\u0430\u0435\u043c \u0440\u0435\u043a\u0443\u0440\u0441\u0438\u044e. \u041a\u043e\u0433\u0434\u0430 \u043c\u0435\u0442\u043e\u0434 \u0434\u043e\u0441\u0442\u0438\u0433\u0430\u0435\u0442 \u043a\u043e\u043d\u0446\u0430, \u0444\u0438\u043a\u0441\u0438\u0440\u0443\u0435\u043c \u0432\u00a0<strong><span style=\"color: #0000ff;\">Result.Error\u00a0<\/span><\/strong>\u043e\u0448\u0438\u0431\u043a\u0443 \u043e \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e\u043c \u043a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u0435 \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u043e\u0432\u00a0\u00a0\u0438 \u043f\u0440\u0435\u043a\u0440\u0430\u0449\u0430\u0435\u043c \u0440\u0435\u043a\u0443\u0440\u0441\u0438\u044e.<\/span><\/span><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-1.46.52-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-1716 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-1.46.52-PM.png\" alt=\"Screen Shot 2015-03-31 at 1.46.52 PM\" width=\"1110\" height=\"1348\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-1.46.52-PM.png 1110w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-1.46.52-PM-247x300.png 247w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-1.46.52-PM-843x1024.png 843w\" sizes=\"auto, (max-width: 1110px) 100vw, 1110px\" \/><\/a><\/p>\n<p>\u0422\u0440\u0435\u0431\u0443\u0435\u043c\u044b\u0439 \u043c\u0435\u0442\u043e\u0434\u00a0<strong><span style=\"color: #0000ff;\">evaluateAndReportErrors()<\/span><\/strong>\u00a0\u0432\u044b\u0437\u044b\u0432\u0430\u0435\u0442 \u0441\u0432\u043e\u0439 \u0432\u0441\u043f\u043e\u043c\u043e\u0433\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u0440\u0435\u043a\u0443\u0440\u0441\u0438\u0432\u043d\u044b\u0439 \u043c\u0435\u0442\u043e\u0434 \u0438 \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u043e\u0446\u0435\u043d\u043a\u0438 \u0441\u0442\u044d\u043a\u0430, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044f Type\u00a0<strong><span style=\"color: #0000ff;\">Result<\/span><\/strong><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-2.08.24-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-1718 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-2.08.24-PM.png\" alt=\"Screen Shot 2015-03-31 at 2.08.24 PM\" width=\"956\" height=\"208\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-2.08.24-PM.png 956w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-2.08.24-PM-300x65.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-2.08.24-PM-500x109.png 500w\" sizes=\"auto, (max-width: 956px) 100vw, 956px\" \/><\/a><\/p>\n<p>\u0421\u043c\u043e\u0442\u0440\u0438\u043c \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0443\u044e \u043f\u043e\u0434\u0441\u043a\u0430\u0437\u043a\u0443 \u0434\u043b\u044f \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u043f\u0443\u043d\u043a\u0442\u0430 3 \u0417\u0430\u0434\u0430\u043d\u0438\u044f 2<\/p>\n<ul>\n<li><strong>\u041d\u0435 \u0437\u0430\u0431\u044b\u0432\u0430\u0439\u0442\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441 \u201c\u0446\u0435\u043f\u043e\u0447\u0435\u043a\u201d\u00a0<span style=\"color: #0000ff;\">Optionals<\/span>. \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0432\u044b \u043c\u043e\u0436\u0435\u0442\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u00a0<span style=\"color: #0000ff;\">Optional\u00a0<\/span>\u00a0\u0444\u0443\u043d\u043a\u0446\u0438\u044e \u0441 \u0438\u043c\u0435\u043d\u0435\u043c<span style=\"color: #0000ff;\">\u00a0errorTest\u00a0<\/span>\u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c\u2026\u00a0<span style=\"color: #0000ff;\">if let failureDescription = errorTest?(arguments) { }<\/span>\u2026 \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:<\/strong>\n<ul>\n<li>\u043f\u0435\u0440\u0432\u044b\u0439 &#8212; \u0435\u0441\u043b\u0438 \u043e\u043d\u0430 \u043e\u0448\u0438\u0431\u043e\u0447\u043d\u0430\u044f, \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<\/li>\n<\/ul>\n<p>\u041c\u044b \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043b\u0438 \u0441\u0438\u043d\u0442\u0430\u043a\u0441\u0438\u0441 &#171;\u0446\u0435\u043f\u043e\u0447\u0435\u043a&#187;\u00a0<strong><span style=\"color: #0000ff;\">Optional<\/span>\u00a0<\/strong>\u043f\u0440\u0438 \u043e\u0446\u0435\u043d\u043a\u0435 \u043e\u0448\u0438\u0431\u043e\u043a, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0431\u0438\u043d\u0430\u0440\u043d\u044b\u0445 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439<\/p>\n<p>[js highlight=&#187;1&#8243;]<br \/>\n if let errMessage = errorTest?(operand1, operand2) {<br \/>\n         return (.Error(errMessage), op1Evaluation.remainingOps)<br \/>\n }<br \/>\n        return (.Value(operation(operand1, operand2)),<br \/>\n                                     op2Evaluation.remainingOps)<br \/>\n[\/js]<\/p>\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 \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u0430, \u0443\u043a\u0430\u0437\u0430\u043d\u043d\u044b\u0435 \u0432\u044b\u0448\u0435. \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;\"><strong>+<\/strong><\/span>&#187; \u0438\u043b\u0438 &#171;<strong><span style=\"color: #0000ff;\">&#8212;<\/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;\">\u00a0errMessage = 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 &#171;<strong><span style=\"color: #0000ff;\">\u00f7<\/span><\/strong>&#171;, \u0430 \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\u00a0<span style=\"color: #0000ff;\"><b>errorTest\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\u041f\u0440\u0435\u0436\u0434\u0435 \u0447\u0435\u043c \u043c\u044b \u043f\u0435\u0440\u0435\u0439\u0434\u0435\u043c \u043a \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044e \u043d\u043e\u0432\u043e\u0433\u043e \u043c\u0435\u0442\u043e\u0434\u0430\u00a0<strong><span style=\"color: #0000ff;\">evaluateAndReportErrors()\u00a0<\/span><\/strong>\u0432\u00a0<strong><span style=\"color: #0000ff;\">ViewController<\/span><\/strong>, \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e, \u0447\u0442\u043e\u0431\u044b \u043d\u0430\u0448 \u0442\u0438\u043f\u00a0<strong><span style=\"color: #0000ff;\">Result<\/span>\u00a0<\/strong>\u043f\u043e\u0434\u0442\u0432\u0435\u0440\u0434\u0438\u043b \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b<span style=\"color: #0000ff;\"><strong>\u00a0Printable\u00a0<\/strong><\/span>\u0438 \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043b\u00a0\u0441\u0432\u043e\u0439\u0441\u0442\u0432\u043e\u00a0<strong><span style=\"color: #0000ff;\">description<\/span><\/strong><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-2.35.57-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-1721 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-2.35.57-PM.png\" alt=\"Screen Shot 2015-03-31 at 2.35.57 PM\" width=\"1112\" height=\"390\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-2.35.57-PM.png 1112w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-2.35.57-PM-300x105.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-2.35.57-PM-1024x359.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-2.35.57-PM-500x175.png 500w\" sizes=\"auto, (max-width: 1112px) 100vw, 1112px\" \/><\/a><\/p>\n<p>\u0412\u00a0<strong><span style=\"color: #0000ff;\">CalculatorBrain<\/span>\u00a0<span style=\"color: #0000ff;\">NSNumberFormatter()<\/span><\/strong>\u00a0\u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u0434\u0432\u0430\u0436\u0434\u044b: \u043e\u0434\u0438\u043d \u0440\u0430\u0437 \u0432\u00a0<strong><span style=\"color: #0000ff;\">description<\/span><\/strong>, \u0430 \u0432\u0442\u043e\u0440\u043e\u0439 &#8212; \u0432<strong><span style=\"color: #0000ff;\">\u00a0Result<\/span><\/strong>. \u0412 \u044d\u0442\u043e\u043c \u0441\u043b\u0443\u0447\u0430\u0435 \u043d\u0443\u0436\u043d\u043e \u043f\u043e\u043c\u043d\u0438\u0442\u044c, \u0447\u0442\u043e\u00a0<strong><span style=\"text-decoration: underline;\">\u0441\u043e\u0437\u0434\u0430\u043d\u0438\u0435 \u0444\u043e\u0440\u043c\u0430\u0442\u0435\u0440\u043e\u0432 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u044d\u043a\u0441\u0442\u0440\u0435\u043c\u0430\u043b\u044c\u043d\u043e \u0437\u0430\u0442\u0440\u0430\u0442\u043d\u043e\u0439 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0435\u0439<\/span><\/strong>, \u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u0439 &#171;\u043f\u043e\u0441\u0442\u0430\u0432\u0438\u0442\u044c \u043d\u0430 \u043a\u043e\u043b\u0435\u043d\u0438&#187; \u0446\u0435\u043b\u043e\u0435 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0435. \u041f\u043e\u044d\u0442\u043e\u043c\u0443 \u043d\u0430\u0441\u0442\u043e\u044f\u0442\u0435\u043b\u044c\u043d\u043e<strong><a href=\"http:\/\/nshipster.com\/nsformatter\/\">\u00a0\u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0443\u0435\u0442\u0441\u044f \u0441\u043e\u0437\u0434\u0430\u0432\u0430\u0442\u044c \u0442\u043e\u043b\u044c\u043a\u043e<\/a>\u00a0\u043e\u0434\u0438\u043d \u044d\u043a\u0437\u0435\u043c\u043f\u043b\u044f\u0440 \u043a\u043b\u0430\u0441\u0441\u0430\u00a0<span style=\"color: #0000ff;\">NSNumberFormatter<\/span><\/strong>\u00a0\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0435\u0433\u043e \u043f\u043e\u0432\u0441\u044e\u0434\u0443 \u0432 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0438. \u041f\u043e\u044d\u0442\u043e\u043c\u0443 \u043f\u043e\u044f\u0432\u0438\u043b\u0441\u044f <strong><span style=\"color: #0000ff;\">NumberFormatter<\/span><\/strong> \u0438 \u0435\u0433\u043e\u00a0<strong><span style=\"color: #ff0000;\">\u043c\u0435\u0442\u043e\u0434 \u043a\u043b\u0430\u0441\u0441\u0430<\/span>\u00a0<span style=\"color: #0000ff;\">formatter<\/span><\/strong><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-24-at-12.18.39-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2764 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-24-at-12.18.39-PM.png\" alt=\"Screen Shot 2015-08-24 at 12.18.39 PM\" width=\"984\" height=\"382\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-24-at-12.18.39-PM.png 984w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-24-at-12.18.39-PM-300x116.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-24-at-12.18.39-PM-500x194.png 500w\" sizes=\"auto, (max-width: 984px) 100vw, 984px\" \/><\/a><br \/>\n\u0422\u0435\u043f\u0435\u0440\u044c \u043f\u0435\u0440\u0435\u0445\u043e\u0434\u0438\u043c \u043a \u043d\u0430\u0448\u0435\u043c\u0443\u00a0<strong><span style=\"color: #0000ff;\">ViewController<\/span>\u00a0<\/strong>\u0438 \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0430\u0435\u043c \u0447\u0438\u0442\u0430\u0442\u044c &#171;\u043f\u043e\u0434\u0441\u043a\u0430\u0437\u043a\u0438&#187; \u043a \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u043c\u0443 \u043f\u0443\u043d\u043a\u0442\u0443 3 \u0417\u0430\u0434\u0430\u043d\u0438\u044f 2.<\/p>\n<ul>\n<li><strong>\u0412 \u0432\u0430\u0448\u0435\u043c\u00a0<span style=\"color: #0000ff;\">ViewController<\/span>\u00a0\u0432\u044b, \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e, \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0438\u0442\u0435, \u0447\u0442\u043e \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f \u043d\u043e\u0432\u043e\u0433\u043e \u00a0\u00a0\u00a0\u0441\u0432\u043e\u0439\u0441\u0442\u0432\u0430\u00a0<span style=\"color: #0000ff;\">var displayResult<\/span>\u00a0( \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u043e\u0431\u0440\u0430\u0431\u0430\u0442\u044b\u0432\u0430\u0435\u0442 \u043a\u0430\u043a \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f, \u0442\u0430\u043a \u0438 \u043e\u0448\u0438\u0431\u043a\u0438) \u0438 \u0440\u0435\u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u044f \u0441\u0442\u0430\u0440\u043e\u0439 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439\u00a0<span style=\"color: #0000ff;\">displayValue<\/span>\u00a0\u00a0\u0432 \u0442\u0435\u0440\u043c\u0438\u043d\u0430\u0445 \u044d\u0442\u043e\u0439 \u043d\u043e\u0432\u043e\u0439 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439\u00a0<span style=\"color: #0000ff;\">var displayResult<\/span>, \u0441\u0434\u0435\u043b\u0430\u0435\u0442 \u0432\u0430\u0448 \u043a\u043e\u0434 \u0431\u043e\u043b\u0435\u0435 \u043f\u043e\u043d\u044f\u0442\u043d\u044b\u043c. \u0418\u043b\u0438 \u043d\u0435\u0442. \u041d\u043e \u044d\u0442\u043e \u0442\u043e\u043b\u044c\u043a\u043e \u043f\u043e\u0434\u0441\u043a\u0430\u0437\u043a\u0430.<\/strong><\/li>\n<\/ul>\n<p>\u0412<strong>\u00a0Controller<\/strong>\u00a0\u0441\u043e\u0437\u0434\u0430\u0435\u043c \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u043e\u00a0<span style=\"color: #0000ff;\"><strong>\u00a0displayResult<\/strong><span style=\"color: #000000;\">, \u0437\u0430\u043f\u043e\u043c\u0438\u043d\u0430\u044e\u0449\u0435\u0435 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u043e\u0446\u0435\u043d\u043a\u0438 \u0441\u0442\u044d\u043a\u0430. \u0415\u0433\u043e \u0442\u0438\u043f &#8212; \u00a0<span style=\"color: #0000ff;\"><strong>Result<\/strong><\/span>, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0437\u0430\u0434\u0435\u043a\u043b\u0430\u0440\u0438\u0440\u043e\u0432\u0430\u043d \u0432 \u041c\u043e\u0434\u0435\u043b\u0438\u00a0<strong><span style=\"color: #0000ff;\">CalculatorBrain<\/span><\/strong>.<\/span><\/span><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.10.13-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-1724 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.10.13-PM.png\" alt=\"Screen Shot 2015-03-31 at 3.10.13 PM\" width=\"926\" height=\"394\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.10.13-PM.png 926w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.10.13-PM-300x128.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.10.13-PM-500x213.png 500w\" sizes=\"auto, (max-width: 926px) 100vw, 926px\" \/><\/a><br \/>\n\u041f\u0440\u0438 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0438 \u044d\u0442\u043e\u0433\u043e \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u0430 \u0432 <strong>\u041d\u0430\u0431\u043b\u044e\u0434\u0430\u0442\u0435\u043b\u0435<\/strong> <strong>\u0421\u0432\u043e\u0439\u0441\u0442\u0432\u0430<\/strong> <span style=\"color: #0000ff;\"><strong>didSe<span style=\"color: #0000ff;\">t<\/span>{}<\/strong><\/span> \u0430\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u0443\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u044e\u0442\u0441\u044f \u0434\u0432\u0435 \u043c\u0435\u0442\u043a\u0438: \u043d\u0430\u0448 \u0434\u0438\u0441\u043f\u043b\u0435\u0439 <span style=\"color: #0000ff;\"><strong>display<\/strong><\/span> \u0441 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u0430\u043c\u0438 \u0440\u0430\u0441\u0447\u0435\u0442\u0430 \u0438 \u043c\u0435\u0442\u043a\u0430 <strong><span style=\"color: #0000ff;\">history<\/span><\/strong> , \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u044e\u0449\u0430\u044f \u0441\u0442\u044d\u043a \u0432 \u0443\u0434\u043e\u0431\u043d\u043e\u0439 \u0438\u043d\u0444\u0438\u043a\u0441\u043d\u043e\u0439 \u0444\u043e\u0440\u043c\u0435. \u0423 \u0421\u0432\u043e\u0439\u0441\u0442\u0432\u0430 \u00a0<strong><span style=\"color: #0000ff;\">displayValue<\/span><\/strong>\u00a0\u043e\u0441\u0442\u0430\u043b\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e\u00a0<strong><span style=\"color: #0000ff;\">get{} <\/span><\/strong><span style=\"color: #0000ff;\"><span style=\"color: #000000;\">\u0438 \u043e\u043d\u043e \u0441\u0442\u0430\u043b\u043e\u00a0<\/span><\/span><span style=\"color: #0000ff;\"><b>read-only<\/b><\/span><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.20.06-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-1725 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.20.06-PM.png\" alt=\"Screen Shot 2015-03-31 at 3.20.06 PM\" width=\"1296\" height=\"260\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.20.06-PM.png 1296w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.20.06-PM-300x60.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.20.06-PM-1024x205.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.20.06-PM-500x100.png 500w\" sizes=\"auto, (max-width: 1296px) 100vw, 1296px\" \/><\/a><\/p>\n<p>\u0412 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u0445 \u043a\u043d\u043e\u043f\u043e\u043a &#171;<strong>\u0421&#187;,<\/strong>\u00a0&#171;<strong>ente<\/strong>r&#187; \u0438 \u0442.\u0434. \u0443\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u0435\u043c\u00a0\u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439\u00a0<strong><span style=\"color: #0000ff;\">displayResult<\/span><\/strong><span style=\"color: #0000ff;\"><span style=\"color: #000000;\">\u00a0\u043d\u0430\u0448\u0435 \u043d\u043e\u0432\u043e\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u043e\u0446\u0435\u043d\u043a\u0438 \u0441\u0442\u044d\u043a\u0430 <strong><span style=\"color: #0000ff;\">brain.evaluateAndReportErrors()<\/span><\/strong><\/span><\/span><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.24.59-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-1726 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.24.59-PM.png\" alt=\"Screen Shot 2015-03-31 at 3.24.59 PM\" width=\"896\" height=\"960\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.24.59-PM.png 896w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.24.59-PM-280x300.png 280w\" sizes=\"auto, (max-width: 896px) 100vw, 896px\" \/><\/a><br \/>\n\u041f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0443\u044e\u00a0<strong><span style=\"color: #0000ff;\">displayValue<\/span><\/strong>\u00a0\u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c \u0442\u043e\u043b\u044c\u043a\u043e \u0434\u043b\u044f \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0441\u0442\u0440\u043e\u043a\u0438, \u0441\u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u043d\u0430 \u0434\u0438\u0441\u043f\u043b\u0435\u0435 <strong><span style=\"color: #0000ff;\">display<\/span><\/strong>, \u0432 <strong><span style=\"color: #0000ff;\">Double?<\/span><\/strong> \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435.<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-24-at-1.32.57-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2765 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-24-at-1.32.57-PM.png\" alt=\"Screen Shot 2015-08-24 at 1.32.57 PM\" width=\"994\" height=\"470\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-24-at-1.32.57-PM.png 994w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-24-at-1.32.57-PM-300x142.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-24-at-1.32.57-PM-500x236.png 500w\" sizes=\"auto, (max-width: 994px) 100vw, 994px\" \/><\/a><br \/>\n\u041a\u043e\u0434 \u0434\u043b\u044f\u00a0<strong>Swift 1.2<\/strong>\u00a0 \u0438\u00a0<strong>iOS 8.4<\/strong>\u00a0\u043c\u043e\u0436\u043d\u043e \u043f\u043e\u0441\u043c\u043e\u0442\u0440\u0435\u0442\u044c\u00a0\u043d\u0430\u00a0<strong><a href=\"https:\/\/github.com\/BestKora\/Calculator-cs193p-Winter-2015-Assigment-2\/tree\/Extra2-3\">Github<\/a><\/strong>.<\/p>\n<p>\u041a\u043e\u0434 \u0434\u043b\u044f\u00a0<strong>Swift 2.0<\/strong>\u00a0\u00a0\u0438\u00a0<strong>iOS 9<\/strong>\u00a0\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\/CalculatorBrain-Assignment-2-iOS-9\">Github<\/a><\/strong>.<br \/>\n\u0420\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b<br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.36.24-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-1727 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.36.24-PM.png\" alt=\"Screen Shot 2015-03-31 at 3.36.24 PM\" width=\"1690\" height=\"978\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.36.24-PM.png 1690w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.36.24-PM-300x174.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.36.24-PM-1024x593.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-31-at-3.36.24-PM-500x289.png 500w\" sizes=\"auto, (max-width: 1690px) 100vw, 1690px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-24-at-2.35.16-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2766 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-24-at-2.35.16-PM.png\" alt=\"Screen Shot 2015-08-24 at 2.35.16 PM\" width=\"2118\" height=\"1338\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-24-at-2.35.16-PM.png 2118w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-24-at-2.35.16-PM-300x190.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-24-at-2.35.16-PM-1024x647.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-24-at-2.35.16-PM-475x300.png 475w\" sizes=\"auto, (max-width: 2118px) 100vw, 2118px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0422\u0435\u043a\u0441\u0442 \u0414\u043e\u043c\u0430\u0448\u043d\u0435\u0433\u043e \u0437\u0430\u0434\u0430\u043d\u0438\u044f \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 \u201cDeveloping iOS 8 app: Programming: Project 2\u2033. \u00a0\u0422\u0435\u043a\u0441\u0442 \u0414\u043e\u043c\u0430\u0448\u043d\u0435\u0433\u043e \u0437\u0430\u0434\u0430\u043d\u0438\u044f \u043d\u0430\u00a0\u0440\u0443\u0441\u0441\u043a\u043e\u043c\u00a0\u00a0\u044f\u0437\u044b\u043a\u0435 \u0434\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043d\u0430 \u0420\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0437\u0430\u0434\u0430\u043d\u0438\u044f \u043c\u043e\u0436\u043d\u043e \u043e\u0431\u0441\u0443\u0436\u0434\u0430\u0442\u044c \u043d\u0430 \u0444\u043e\u0440\u0443\u043c\u0435\u00a0Swift[ru]\u00a0. \u0412\u0430\u0448\u0435 \u0440\u0435\u0448\u0435\u043d\u0438\u0435 \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u043b\u0443\u0447\u0448\u0435 \u0438 \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u0435\u0435. \u0412\u044b\u043a\u043b\u0430\u0434\u044b\u0432\u0430\u0439\u0442\u0435 \u0435\u0433\u043e \u0432\u00a0Github,\u00a0\u0434\u0430\u0432\u0430\u0439\u0442\u0435 &hellip; <a href=\"https:\/\/bestkora.com\/IosDeveloper\/zadanie-2-reshenie-vozvrashhaem-enum-result-dopolnitelnye-punkty-2-3-swift-1-2-i-swift-2-0\/\">\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":[22,23,14,4],"tags":[30,26],"class_list":["post-2760","post","type-post","status-publish","format-standard","hentry","category-ios-8","category-stanford-cs-193p-ios-8","category-swift","category-domashnee-zadanie","tag-domashnee-zadanie","tag-zadanie-ios-8"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.8 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u0440\u0438 \u0432\u043e\u0437\u043d\u0438\u043a\u043d\u043e\u0432\u0435\u043d\u0438\u0438 \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u0441 \u043e\u0446\u0435\u043d\u043a\u043e\u0439 \u0441\u0442\u044d\u043a\u0430 (\u043d\u0435 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u044b \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f 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\u0432\u043e\u0437\u043d\u0438\u043a\u043d\u043e\u0432\u0435\u043d\u0438\u0438 \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u0441 \u043e\u0446\u0435\u043d\u043a\u043e\u0439 \u0441\u0442\u044d\u043a\u0430 (\u043d\u0435 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u044b \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445 \u0438\u043b\u0438 \u043f\u0440\u043e\u043f\u0443\u0449\u0435\u043d\u044b \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u044b, \u0434\u0435\u043b\u0435\u043d\u0438\u0435 \u043d\u0430 0, \u043a\u0432\u0430\u0434\u0440\u0430\u0442\u043d\u044b\u0439 \u043a\u043e\u0440\u0435\u043d\u044c \u0438\u0437 \u043e\u0442\u0440\u0438\u0446\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u0447\u0438\u0441\u043b\u0430 \u0438 \u0442.\u0434.) \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442\u0441\u044f String \u0441 \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0435\u043c 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\u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439.\" \/>\n\t\t<meta name=\"twitter:description\" content=\"\u041f\u0440\u0438 \u0432\u043e\u0437\u043d\u0438\u043a\u043d\u043e\u0432\u0435\u043d\u0438\u0438 \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u0441 \u043e\u0446\u0435\u043d\u043a\u043e\u0439 \u0441\u0442\u044d\u043a\u0430 (\u043d\u0435 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u044b \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445 \u0438\u043b\u0438 \u043f\u0440\u043e\u043f\u0443\u0449\u0435\u043d\u044b \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u044b, \u0434\u0435\u043b\u0435\u043d\u0438\u0435 \u043d\u0430 0, \u043a\u0432\u0430\u0434\u0440\u0430\u0442\u043d\u044b\u0439 \u043a\u043e\u0440\u0435\u043d\u044c \u0438\u0437 \u043e\u0442\u0440\u0438\u0446\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u0447\u0438\u0441\u043b\u0430 \u0438 \u0442.\u0434.) 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2. \u0420\u0435\u0448\u0435\u043d\u0438\u0435 - \u0412\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u043c enum Result (\u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u043f\u0443\u043d\u043a\u0442\u044b 2, 3) Swift 1.2 \u0438 Swift 2.0 | \u041e\u0431\u0443\u0447\u0430\u044e\u0449\u0438\u0439 \u043a\u0443\u0440\u0441 \u043f\u043e \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0435 iOS+Swift \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439.","description":"\u041f\u0440\u0438 \u0432\u043e\u0437\u043d\u0438\u043a\u043d\u043e\u0432\u0435\u043d\u0438\u0438 \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u0441 \u043e\u0446\u0435\u043d\u043a\u043e\u0439 \u0441\u0442\u044d\u043a\u0430 (\u043d\u0435 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u044b \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445 \u0438\u043b\u0438 \u043f\u0440\u043e\u043f\u0443\u0449\u0435\u043d\u044b \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u044b, \u0434\u0435\u043b\u0435\u043d\u0438\u0435 \u043d\u0430 0, \u043a\u0432\u0430\u0434\u0440\u0430\u0442\u043d\u044b\u0439 \u043a\u043e\u0440\u0435\u043d\u044c \u0438\u0437 \u043e\u0442\u0440\u0438\u0446\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u0447\u0438\u0441\u043b\u0430 \u0438 \u0442.\u0434.) \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442\u0441\u044f String \u0441 \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0435\u043c \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b","inLanguage":"ru-RU","isPartOf":{"@id":"https:\/\/bestkora.com\/IosDeveloper\/#website"},"breadcrumb":{"@id":"https:\/\/bestkora.com\/IosDeveloper\/zadanie-2-reshenie-vozvrashhaem-enum-result-dopolnitelnye-punkty-2-3-swift-1-2-i-swift-2-0\/#breadcrumblist"},"author":{"@id":"https:\/\/bestkora.com\/IosDeveloper\/author\/tatiana-lornilovagmail-com\/#author"},"creator":{"@id":"https:\/\/bestkora.com\/IosDeveloper\/author\/tatiana-lornilovagmail-com\/#author"},"datePublished":"2015-03-30T08:32:13+00:00","dateModified":"2016-06-09T19:36:39+00:00"},{"@type":"WebSite","@id":"https:\/\/bestkora.com\/IosDeveloper\/#website","url":"https:\/\/bestkora.com\/IosDeveloper\/","name":"\u041e\u0431\u0443\u0447\u0430\u044e\u0449\u0438\u0439 \u043a\u0443\u0440\u0441 \u043f\u043e \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0435 iOS+Swift \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439.","description":"\u0420\u0443\u0441\u0441\u043a\u0438\u0439 \u043d\u0435\u0430\u0432\u0442\u043e\u0440\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u043a\u043e\u043d\u0441\u043f\u0435\u043a\u0442 \u043b\u0435\u043a\u0446\u0438\u0439 \u0421\u0442\u044d\u043d\u0444\u043e\u0440\u0434\u0441\u043a\u043e\u0433\u043e \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442\u0430 \" \u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0430 iOS \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439\" 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 , 2023,  2024,  2025  \u0438 2026 \u0433\u0433., \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0430\u0435\u043c\u044b\u0439 \u0440\u0435\u0448\u0435\u043d\u0438\u044f\u043c\u0438 \u0437\u0430\u0434\u0430\u043d\u0438\u0439 \u0438 \u0434\u043e\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f\u043c\u0438, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u043c\u0438 \u0441 \u0430\u0434\u0430\u043f\u0442\u0430\u0446\u0438\u0435\u0439 \u043a\u0443\u0440\u0441\u043e\u0432 \u043a \u043d\u043e\u0432\u044b\u043c \u0432\u0435\u0440\u0441\u0438\u044f\u043c Swift, Objective-C \u0438 iOS.","inLanguage":"ru-RU","publisher":{"@id":"https:\/\/bestkora.com\/IosDeveloper\/#person"}}]},"og:locale":"ru_RU","og:site_name":"\u041e\u0431\u0443\u0447\u0430\u044e\u0449\u0438\u0439 \u043a\u0443\u0440\u0441 \u043f\u043e \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0435 iOS+Swift \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439. | \u0420\u0443\u0441\u0441\u043a\u0438\u0439 \u043d\u0435\u0430\u0432\u0442\u043e\u0440\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u043a\u043e\u043d\u0441\u043f\u0435\u043a\u0442 \u043b\u0435\u043a\u0446\u0438\u0439 \u0421\u0442\u044d\u043d\u0444\u043e\u0440\u0434\u0441\u043a\u043e\u0433\u043e \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442\u0430 &quot; \u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0430 iOS \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439&quot; 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 , 2023,  2024,  2025  \u0438 2026 \u0433\u0433., \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0430\u0435\u043c\u044b\u0439 \u0440\u0435\u0448\u0435\u043d\u0438\u044f\u043c\u0438 \u0437\u0430\u0434\u0430\u043d\u0438\u0439 \u0438 \u0434\u043e\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f\u043c\u0438, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u043c\u0438 \u0441 \u0430\u0434\u0430\u043f\u0442\u0430\u0446\u0438\u0435\u0439 \u043a\u0443\u0440\u0441\u043e\u0432 \u043a \u043d\u043e\u0432\u044b\u043c \u0432\u0435\u0440\u0441\u0438\u044f\u043c Swift, Objective-C \u0438 iOS.","og:type":"article","og:title":"\u0417\u0430\u0434\u0430\u043d\u0438\u0435 2. \u0420\u0435\u0448\u0435\u043d\u0438\u0435 - \u0412\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u043c enum Result (\u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u043f\u0443\u043d\u043a\u0442\u044b 2, 3) Swift 1.2 \u0438 Swift 2.0 | \u041e\u0431\u0443\u0447\u0430\u044e\u0449\u0438\u0439 \u043a\u0443\u0440\u0441 \u043f\u043e \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0435 iOS+Swift \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439.","og:description":"\u041f\u0440\u0438 \u0432\u043e\u0437\u043d\u0438\u043a\u043d\u043e\u0432\u0435\u043d\u0438\u0438 \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u0441 \u043e\u0446\u0435\u043d\u043a\u043e\u0439 \u0441\u0442\u044d\u043a\u0430 (\u043d\u0435 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u044b \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445 \u0438\u043b\u0438 \u043f\u0440\u043e\u043f\u0443\u0449\u0435\u043d\u044b \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u044b, \u0434\u0435\u043b\u0435\u043d\u0438\u0435 \u043d\u0430 0, \u043a\u0432\u0430\u0434\u0440\u0430\u0442\u043d\u044b\u0439 \u043a\u043e\u0440\u0435\u043d\u044c \u0438\u0437 \u043e\u0442\u0440\u0438\u0446\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u0447\u0438\u0441\u043b\u0430 \u0438 \u0442.\u0434.) \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442\u0441\u044f String \u0441 \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0435\u043c \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b","og:url":"https:\/\/bestkora.com\/IosDeveloper\/zadanie-2-reshenie-vozvrashhaem-enum-result-dopolnitelnye-punkty-2-3-swift-1-2-i-swift-2-0\/","article:published_time":"2015-03-30T08:32:13+00:00","article:modified_time":"2016-06-09T19:36:39+00:00","twitter:card":"summary","twitter:title":"\u0417\u0430\u0434\u0430\u043d\u0438\u0435 2. \u0420\u0435\u0448\u0435\u043d\u0438\u0435 - \u0412\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u043c enum Result (\u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u043f\u0443\u043d\u043a\u0442\u044b 2, 3) Swift 1.2 \u0438 Swift 2.0 | \u041e\u0431\u0443\u0447\u0430\u044e\u0449\u0438\u0439 \u043a\u0443\u0440\u0441 \u043f\u043e \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0435 iOS+Swift \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439.","twitter:description":"\u041f\u0440\u0438 \u0432\u043e\u0437\u043d\u0438\u043a\u043d\u043e\u0432\u0435\u043d\u0438\u0438 \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u0441 \u043e\u0446\u0435\u043d\u043a\u043e\u0439 \u0441\u0442\u044d\u043a\u0430 (\u043d\u0435 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u044b \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445 \u0438\u043b\u0438 \u043f\u0440\u043e\u043f\u0443\u0449\u0435\u043d\u044b \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u044b, \u0434\u0435\u043b\u0435\u043d\u0438\u0435 \u043d\u0430 0, \u043a\u0432\u0430\u0434\u0440\u0430\u0442\u043d\u044b\u0439 \u043a\u043e\u0440\u0435\u043d\u044c \u0438\u0437 \u043e\u0442\u0440\u0438\u0446\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u0447\u0438\u0441\u043b\u0430 \u0438 \u0442.\u0434.) \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442\u0441\u044f String \u0441 \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0435\u043c \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b"},"aioseo_meta_data":{"post_id":"2760","title":"\u0417\u0430\u0434\u0430\u043d\u0438\u0435 2. \u0420\u0435\u0448\u0435\u043d\u0438\u0435 -  \u0412\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u043c enum Result (\u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u043f\u0443\u043d\u043a\u0442\u044b 2, 3) Swift 1.2  \u0438 Swift 2.0 | #site_title","description":"\u041f\u0440\u0438 \u0432\u043e\u0437\u043d\u0438\u043a\u043d\u043e\u0432\u0435\u043d\u0438\u0438 \u043f\u0440\u043e\u0431\u043b\u0435\u043c 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