{"id":1790,"date":"2019-04-13T08:34:22","date_gmt":"2019-04-13T08:34:22","guid":{"rendered":"http:\/\/demensdeum.com\/blog\/?p=1790"},"modified":"2024-12-16T22:32:38","modified_gmt":"2024-12-16T19:32:38","slug":"visitor-pattern","status":"publish","type":"post","link":"https:\/\/demensdeum.com\/blog\/ru\/2019\/04\/13\/visitor-pattern\/","title":{"rendered":"Visitor \u043f\u0430\u0442\u0442\u0435\u0440\u043d"},"content":{"rendered":"<p><em>\u0412 \u0434\u0430\u043d\u043d\u043e\u0439 \u0437\u0430\u043c\u0435\u0442\u043a\u0435 \u044f \u043e\u043f\u0438\u0448\u0443 \u043f\u0430\u0442\u0442\u0435\u0440\u043d \u043f\u0440\u043e\u0435\u043a\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u043e\u0434 \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u0435\u043c &#8220;\u041f\u043e\u0441\u0435\u0442\u0438\u0442\u0435\u043b\u044c&#8221; \u0438\u043b\u0438 &#8220;Visitor&#8221;<br \/><\/em>\u0414\u0430\u043d\u043d\u044b\u0439 \u043f\u0430\u0442\u0442\u0435\u0440\u043d \u043e\u0442\u043d\u043e\u0441\u0438\u0442\u0441\u044f \u043a \u0433\u0440\u0443\u043f\u043f\u0435 <strong>\u041f\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u0448\u0430\u0431\u043b\u043e\u043d\u043e\u0432<\/strong>.<\/p>\n<h3>\u041f\u0440\u0438\u0434\u0443\u043c\u0430\u0435\u043c \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0443<\/h3>\n<p>\u0412 \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u043c, \u0434\u0430\u043d\u043d\u044b\u0439 \u043f\u0430\u0442\u0442\u0435\u0440\u043d \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0442 \u0434\u043b\u044f \u043e\u0431\u0445\u043e\u0434\u0430 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f \u043e\u0434\u0438\u043d\u043e\u0447\u043d\u043e\u0439 \u0434\u0438\u0441\u043f\u0435\u0442\u0447\u0435\u0440\u0438\u0437\u0430\u0446\u0438\u0438 (&#8220;single dispatch&#8221;), \u0432 \u044f\u0437\u044b\u043a\u0430\u0445 \u0441 \u0440\u0430\u043d\u043d\u0438\u043c \u0441\u0432\u044f\u0437\u044b\u0432\u0430\u043d\u0438\u0435\u043c.<\/p>\n<p><a href=\"https:\/\/www.flickr.com\/photos\/nfg\/16506635470\/in\/photostream\/\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1798\" src=\"https:\/\/demensdeum.com\/blog\/wp-content\/uploads\/2019\/04\/kinbaku.jpg\" alt=\"\" width=\"420\" height=\"640\" \/><\/a><\/p>\n<p><a href=\"https:\/\/www.flickr.com\/photos\/nfg\/16506635470\/in\/photostream\/\" target=\"_blank\" rel=\"noopener noreferrer\">Alice X<\/a> by <a href=\"https:\/\/nfgphoto.com\" target=\"_blank\" rel=\"noopener noreferrer\">NFGPhoto<\/a> (<a href=\"https:\/\/creativecommons.org\/licenses\/by\/2.0\/\" target=\"_blank\" rel=\"noopener noreferrer\">CC-2.0<\/a>)<br \/>\u0421\u043e\u0437\u0434\u0430\u0434\u0438\u043c \u0430\u0431\u0441\u0442\u0440\u0430\u043a\u0442\u043d\u044b\u0439 \u043a\u043b\u0430\u0441\u0441\/\u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b Band, \u0441\u0434\u0435\u043b\u0430\u0435\u043c \u043f\u043e\u0434\u043a\u043b\u0430\u0441\u0441 MurpleDeep, \u0441\u043e\u0437\u0434\u0430\u0434\u0438\u043c \u043a\u043b\u0430\u0441\u0441 Visitor \u0441 \u0434\u0432\u0443\u043c\u044f \u043c\u0435\u0442\u043e\u0434\u0430\u043c\u0438 &#8211; \u043e\u0434\u0438\u043d \u0434\u043b\u044f \u0432\u044b\u0432\u043e\u0434\u0430 \u0432 \u043a\u043e\u043d\u0441\u043e\u043b\u044c \u043b\u044e\u0431\u043e\u0433\u043e \u043d\u0430\u0441\u043b\u0435\u0434\u043d\u0438\u043a\u0430 Band, \u0432\u0442\u043e\u0440\u043e\u0439 \u0434\u043b\u044f \u0432\u044b\u0432\u043e\u0434\u0430 \u043b\u044e\u0431\u043e\u0433\u043e MurpleDeep, \u0433\u043b\u0430\u0432\u043d\u043e\u0435 \u0447\u0442\u043e\u0431\u044b \u0438\u043c\u0435\u043d\u0430 (\u0441\u0438\u0433\u043d\u0430\u0442\u0443\u0440\u044b) \u0443 \u043c\u0435\u0442\u043e\u0434\u043e\u0432 \u0431\u044b\u043b\u0438 \u043e\u0434\u0438\u043d\u0430\u043a\u043e\u0432\u044b\u0435, \u0430 \u0430\u0440\u0433\u0443\u043c\u0435\u043d\u0442\u044b \u0440\u0430\u0437\u043b\u0438\u0447\u0430\u043b\u0438\u0441\u044c \u0442\u043e\u043b\u044c\u043a\u043e \u043a\u043b\u0430\u0441\u0441\u043e\u043c. \u0427\u0435\u0440\u0435\u0437 \u043f\u0440\u043e\u043c\u0435\u0436\u0443\u0442\u043e\u0447\u043d\u044b\u0439 \u043c\u0435\u0442\u043e\u0434 printout \u0441 \u0430\u0440\u0433\u0443\u043c\u0435\u043d\u0442\u043e\u043c Band, \u0441\u043e\u0437\u0434\u0430\u0434\u0438\u043c \u044d\u043a\u0437\u0435\u043c\u043f\u043b\u044f\u0440 Visitor \u0438 \u0432\u044b\u0437\u043e\u0432\u0435\u043c \u043c\u0435\u0442\u043e\u0434 visit \u0434\u043b\u044f MurpleDeep.<br \/>\u0414\u0430\u043b\u0435\u0435 \u043a\u043e\u0434 \u043d\u0430 Kotlin:<br \/><!-- iframe plugin v.5.1 wordpress.org\/plugins\/iframe\/ --><br \/>\n<iframe loading=\"lazy\" src=\"https:\/\/pl.kotl.in\/qsxky0Z8C\" width=\"360\" height=\"400\" scrolling=\"yes\" class=\"iframe-class\" frameborder=\"0\"><\/iframe>\n<\/p>\n<p>\u0412 \u0432\u044b\u0432\u043e\u0434\u0435 \u0431\u0443\u0434\u0435\u0442 &#8220;<strong><span class=\"standard-output darcula\">This is Band class<\/span><\/strong>&#8220;<\/p>\n<h3>\u0414\u0430 \u043a\u0430\u043a \u0442\u0430\u043a \u0442\u043e?!<\/h3>\n<p>\u041f\u043e\u0447\u0435\u043c\u0443 \u044d\u0442\u043e \u043f\u0440\u043e\u0438\u0441\u0445\u043e\u0434\u0438\u0442 \u043e\u043f\u0438\u0441\u0430\u043d\u043e  \u0443\u043c\u043d\u044b\u043c\u0438 \u0441\u043b\u043e\u0432\u0430\u043c\u0438 \u0432\u043e \u043c\u043d\u043e\u0433\u0438\u0445 \u0441\u0442\u0430\u0442\u044c\u044f\u0445, \u0432 \u0442\u043e\u043c \u0447\u0438\u0441\u043b\u0435 \u0438 \u043d\u0430 \u0440\u0443\u0441\u0441\u043a\u043e\u043c, \u044f \u0436\u0435 \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u044e \u0432\u0430\u043c \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u0442\u044c \u043a\u0430\u043a \u0432\u0438\u0434\u0438\u0442 \u043a\u043e\u0434 \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440, \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e \u0432\u0441\u0435 \u0441\u0442\u0430\u043d\u0435\u0442 \u043f\u043e\u043d\u044f\u0442\u043d\u043e \u0441\u0440\u0430\u0437\u0443:<br \/><!-- iframe plugin v.5.1 wordpress.org\/plugins\/iframe\/ --><br \/>\n<iframe loading=\"lazy\" src=\"https:\/\/pl.kotl.in\/oBsgszLCO\" width=\"360\" height=\"500\" scrolling=\"yes\" class=\"iframe-class\" frameborder=\"0\"><\/iframe>\n<\/p>\n<h3>\u0420\u0435\u0448\u0430\u0435\u043c \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0443<\/h3>\n<p>\u0414\u043b\u044f \u0440\u0435\u0448\u0435\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u043e\u0439 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u0435\u0442 \u043c\u043d\u043e\u0436\u0435\u0441\u0442\u0432\u043e \u0440\u0435\u0448\u0435\u043d\u0438\u0439, \u0434\u0430\u043b\u0435\u0435 \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0438\u043c \u0440\u0435\u0448\u0435\u043d\u0438\u0435 \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u043f\u0430\u0442\u0442\u0435\u0440\u043d\u0430 Visitor.<br \/>\u0412 \u0430\u0431\u0441\u0442\u0440\u0430\u043a\u0442\u043d\u044b\u0439 \u043a\u043b\u0430\u0441\u0441\/\u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u0435\u043c \u043c\u0435\u0442\u043e\u0434 accept \u0441 \u0430\u0440\u0433\u0443\u043c\u0435\u043d\u0442\u043e\u043c Visitor, \u0432\u043d\u0443\u0442\u0440\u0438 \u043c\u0435\u0442\u043e\u0434\u0430 \u0432\u044b\u0437\u044b\u0432\u0430\u0435\u043c visitor.visit(this), \u043f\u043e\u0441\u043b\u0435 \u044d\u0442\u043e\u0433\u043e \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u0435\u043c \u0432 \u043a\u043b\u0430\u0441\u0441 MurpleDeep \u043e\u0432\u0435\u0440\u0430\u0439\u0434\/\u0438\u043c\u043f\u043b\u0435\u043c\u0435\u043d\u0442\u0430\u0446\u0438\u044e \u043c\u0435\u0442\u043e\u0434\u0430 accept, \u0440\u0435\u0448\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u0438 \u0441\u043f\u043e\u043a\u043e\u0439\u043d\u043e \u043d\u0430\u0440\u0443\u0448\u0430\u044f DRY, \u0441\u043d\u043e\u0432\u0430 \u043f\u0438\u0448\u0435\u043c visitor.visit(this).<br \/>\u0418\u0442\u043e\u0433\u043e\u0432\u044b\u0439 \u043a\u043e\u0434:<br \/><!-- iframe plugin v.5.1 wordpress.org\/plugins\/iframe\/ --><br \/>\n<iframe loading=\"lazy\" src=\"https:\/\/pl.kotl.in\/0fvYomzJd\" width=\"360\" height=\"500\" scrolling=\"yes\" class=\"iframe-class\" frameborder=\"0\"><\/iframe>\n<\/p>\n<h3>\u0418\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438<\/h3>\n<p><a href=\"https:\/\/refactoring.guru\/ru\/design-patterns\/visitor-double-dispatch\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/refactoring.guru\/ru\/design-patterns\/visitor-double-dispatch<\/a><\/p>\n<h3>\u0418\u0441\u0445\u043e\u0434\u043d\u044b\u0439 \u043a\u043e\u0434<\/h3>\n<p><a href=\"https:\/\/gitlab.com\/demensdeum\/patterns\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/gitlab.com\/demensdeum\/patterns<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0412 \u0434\u0430\u043d\u043d\u043e\u0439 \u0437\u0430\u043c\u0435\u0442\u043a\u0435 \u044f \u043e\u043f\u0438\u0448\u0443 \u043f\u0430\u0442\u0442\u0435\u0440\u043d \u043f\u0440\u043e\u0435\u043a\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u043e\u0434 \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u0435\u043c &#8220;\u041f\u043e\u0441\u0435\u0442\u0438\u0442\u0435\u043b\u044c&#8221; \u0438\u043b\u0438 &#8220;Visitor&#8221;\u0414\u0430\u043d\u043d\u044b\u0439 \u043f\u0430\u0442\u0442\u0435\u0440\u043d \u043e\u0442\u043d\u043e\u0441\u0438\u0442\u0441\u044f \u043a \u0433\u0440\u0443\u043f\u043f\u0435 \u041f\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u0448\u0430\u0431\u043b\u043e\u043d\u043e\u0432. \u041f\u0440\u0438\u0434\u0443\u043c\u0430\u0435\u043c \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0443 \u0412 \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u043c, \u0434\u0430\u043d\u043d\u044b\u0439 \u043f\u0430\u0442\u0442\u0435\u0440\u043d \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0442 \u0434\u043b\u044f \u043e\u0431\u0445\u043e\u0434\u0430 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u044f \u043e\u0434\u0438\u043d\u043e\u0447\u043d\u043e\u0439 \u0434\u0438\u0441\u043f\u0435\u0442\u0447\u0435\u0440\u0438\u0437\u0430\u0446\u0438\u0438 (&#8220;single dispatch&#8221;), \u0432 \u044f\u0437\u044b\u043a\u0430\u0445 \u0441 \u0440\u0430\u043d\u043d\u0438\u043c \u0441\u0432\u044f\u0437\u044b\u0432\u0430\u043d\u0438\u0435\u043c. Alice X by NFGPhoto (CC-2.0)\u0421\u043e\u0437\u0434\u0430\u0434\u0438\u043c \u0430\u0431\u0441\u0442\u0440\u0430\u043a\u0442\u043d\u044b\u0439 \u043a\u043b\u0430\u0441\u0441\/\u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b Band, \u0441\u0434\u0435\u043b\u0430\u0435\u043c \u043f\u043e\u0434\u043a\u043b\u0430\u0441\u0441 MurpleDeep, \u0441\u043e\u0437\u0434\u0430\u0434\u0438\u043c \u043a\u043b\u0430\u0441\u0441 Visitor \u0441 \u0434\u0432\u0443\u043c\u044f \u043c\u0435\u0442\u043e\u0434\u0430\u043c\u0438 &#8211;<a class=\"more-link\" href=\"https:\/\/demensdeum.com\/blog\/ru\/2019\/04\/13\/visitor-pattern\/\">Continue reading <span class=\"screen-reader-text\">&#8220;Visitor \u043f\u0430\u0442\u0442\u0435\u0440\u043d&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[61,52],"tags":[95,98],"class_list":["post-1790","post","type-post","status-publish","format-standard","hentry","category-techie","category-tutorials","tag-patterns","tag-visitor","entry"],"translation":{"provider":"WPGlobus","version":"3.0.2","language":"ru","enabled_languages":["en","ru","zh","de","fr","ja","pt","hi"],"languages":{"en":{"title":true,"content":true,"excerpt":false},"ru":{"title":true,"content":true,"excerpt":false},"zh":{"title":true,"content":true,"excerpt":false},"de":{"title":true,"content":true,"excerpt":false},"fr":{"title":true,"content":true,"excerpt":false},"ja":{"title":true,"content":true,"excerpt":false},"pt":{"title":true,"content":true,"excerpt":false},"hi":{"title":false,"content":false,"excerpt":false}}},"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/demensdeum.com\/blog\/ru\/wp-json\/wp\/v2\/posts\/1790","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/demensdeum.com\/blog\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/demensdeum.com\/blog\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/ru\/wp-json\/wp\/v2\/comments?post=1790"}],"version-history":[{"count":38,"href":"https:\/\/demensdeum.com\/blog\/ru\/wp-json\/wp\/v2\/posts\/1790\/revisions"}],"predecessor-version":[{"id":3960,"href":"https:\/\/demensdeum.com\/blog\/ru\/wp-json\/wp\/v2\/posts\/1790\/revisions\/3960"}],"wp:attachment":[{"href":"https:\/\/demensdeum.com\/blog\/ru\/wp-json\/wp\/v2\/media?parent=1790"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/ru\/wp-json\/wp\/v2\/categories?post=1790"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/ru\/wp-json\/wp\/v2\/tags?post=1790"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}