{"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\/ja\/2019\/04\/13\/visitor-pattern\/","title":{"rendered":"\u8a2a\u554f\u8005\u306e\u30d1\u30bf\u30fc\u30f3"},"content":{"rendered":"<p><em>\u3053\u306e\u6295\u7a3f\u3067\u306f\u3001\u300c\u8a2a\u554f\u8005\u300d\u3068\u547c\u3070\u308c\u308b\u30c7\u30b6\u30a4\u30f3 \u30d1\u30bf\u30fc\u30f3\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002\u307e\u305f\u306f\u300c\u8a2a\u554f\u8005\u300d<br \/><\/em>\u3053\u306e\u30d1\u30bf\u30fc\u30f3\u306f<strong>\u884c\u52d5\u30d1\u30bf\u30fc\u30f3<\/strong>\u306e\u30b0\u30eb\u30fc\u30d7\u306b\u5c5e\u3057\u307e\u3059\u3002<\/p>\n<h3>\u554f\u984c\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046<\/h3>\n<p>\u3053\u306e\u30d1\u30bf\u30fc\u30f3\u306f\u4e3b\u306b\u3001\u65e9\u671f\u30d0\u30a4\u30f3\u30c9\u8a00\u8a9e\u306b\u304a\u3051\u308b\u5358\u4e00\u30c7\u30a3\u30b9\u30d1\u30c3\u30c1\u306e\u5236\u9650\u3092\u56de\u907f\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/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\">\u30a2\u30ea\u30b9 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 \/>\u62bd\u8c61\u30af\u30e9\u30b9\/\u30d7\u30ed\u30c8\u30b3\u30eb Band \u3092\u4f5c\u6210\u3057\u3001MurpleDeep \u306e\u30b5\u30d6\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u30012 \u3064\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3064 Visitor \u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u307e\u3057\u3087\u3046\u3002 1 \u3064\u306f Band \u306e\u5b50\u5b6b\u3092\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u51fa\u529b\u3059\u308b\u305f\u3081\u306e\u3082\u306e\u3067\u30012 \u3064\u76ee\u306f MurpleDeep \u3092\u51fa\u529b\u3059\u308b\u305f\u3081\u306e\u3082\u306e\u3067\u3059\u3002\u4e3b\u306a\u3053\u3068\u306f\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u540d\u524d (\u30b7\u30b0\u30cd\u30c1\u30e3) \u304c\u540c\u3058\u3067\u3001\u5f15\u6570\u304c\u30af\u30e9\u30b9\u306b\u3088\u3063\u3066\u306e\u307f\u7570\u306a\u308b\u3053\u3068\u3067\u3059\u3002 Band \u5f15\u6570\u3092\u6307\u5b9a\u3057\u305f\u4e2d\u9593\u51fa\u529b\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066 Visitor \u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3057\u3001MurpleDeep \u306e visit \u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u307e\u3059\u3002<br \/>\u4ee5\u4e0b\u306f Kotlin \u306e\u30b3\u30fc\u30c9\u3067\u3059\u3002<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>\u51fa\u529b\u306f &#8220;<strong><span class=\"standard-output darcula\">\u3053\u308c\u306f\u30d0\u30f3\u30c9 \u30af\u30e9\u30b9\u3067\u3059<\/span><\/strong>&#8220;<\/p>\n<h3>\u3069\u3046\u3057\u3066\u305d\u3093\u306a\u3053\u3068\u304c\u53ef\u80fd\u306a\u306e\u3067\u3057\u3087\u3046\u304b?!<\/h3>\n<p>\u306a\u305c\u3053\u308c\u304c\u8d77\u3053\u308b\u306e\u304b\u306f\u3001\u30ed\u30b7\u30a2\u8a9e\u3092\u542b\u3080\u591a\u304f\u306e\u8a18\u4e8b\u3067\u8ce2\u660e\u306a\u8a00\u8449\u3067\u8aac\u660e\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u30fc\u304c\u30b3\u30fc\u30c9\u3092\u3069\u306e\u3088\u3046\u306b\u8a8d\u8b58\u3059\u308b\u304b\u3092\u60f3\u50cf\u3057\u3066\u307f\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002\u304a\u305d\u3089\u304f\u3059\u3079\u3066\u304c\u3059\u3050\u306b\u660e\u3089\u304b\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u3002<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>\u554f\u984c\u306e\u89e3\u6c7a<\/h3>\n<p>\u3053\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u306b\u306f\u591a\u304f\u306e\u89e3\u6c7a\u7b56\u304c\u3042\u308a\u307e\u3059\u3002\u6b21\u306b\u3001\u8a2a\u554f\u8005\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u305f\u89e3\u6c7a\u7b56\u3092\u691c\u8a0e\u3057\u307e\u3059\u3002<br \/>Visitor \u5f15\u6570\u3092\u6301\u3064 accept \u30e1\u30bd\u30c3\u30c9\u3092\u62bd\u8c61\u30af\u30e9\u30b9\/\u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u8ffd\u52a0\u3057\u3001\u30e1\u30bd\u30c3\u30c9\u5185\u3067visitor.visit(this) \u3092\u547c\u3073\u51fa\u3057\u3001\u6b21\u306b accept \u30e1\u30bd\u30c3\u30c9\u306e\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\/\u5b9f\u88c5\u3092 MurpleDeep \u30af\u30e9\u30b9\u306b\u8ffd\u52a0\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u6c7a\u5b9a\u7684\u304b\u3064\u51b7\u9759\u306b DRY \u306b\u9055\u53cd\u3057\u3001\u518d\u5ea6\u6b21\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002 Visitor.visit(this).< br \/>\u6700\u7d42\u30b3\u30fc\u30c9:<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>\u30bd\u30fc\u30b9<\/h3>\n<p><a href=\"https:\/\/refactoring.guru\/ru\/design-patterns\/visitor-double-dispatch\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/refactoring.guru\/ru\/\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\/\u8a2a\u554f\u8005-\u30c0\u30d6\u30eb\u30c7\u30a3\u30b9\u30d1\u30c3\u30c1<\/a><\/p>\n<h3>\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9<\/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>\u3053\u306e\u6295\u7a3f\u3067\u306f\u3001\u300c\u8a2a\u554f\u8005\u300d\u3068\u547c\u3070\u308c\u308b\u30c7\u30b6\u30a4\u30f3 \u30d1\u30bf\u30fc\u30f3\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002\u307e\u305f\u306f\u300c\u8a2a\u554f\u8005\u300d\u3053\u306e\u30d1\u30bf\u30fc\u30f3\u306f\u884c\u52d5\u30d1\u30bf\u30fc\u30f3\u306e\u30b0\u30eb\u30fc\u30d7\u306b\u5c5e\u3057\u307e\u3059\u3002 \u554f\u984c\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046 \u3053\u306e\u30d1\u30bf\u30fc\u30f3\u306f\u4e3b\u306b\u3001\u65e9\u671f\u30d0\u30a4\u30f3\u30c9\u8a00\u8a9e\u306b\u304a\u3051\u308b\u5358\u4e00\u30c7\u30a3\u30b9\u30d1\u30c3\u30c1\u306e\u5236\u9650\u3092\u56de\u907f\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002 \u30a2\u30ea\u30b9 X by NFGPhoto (CC-2.0)\u62bd\u8c61\u30af\u30e9\u30b9\/\u30d7\u30ed\u30c8\u30b3\u30eb Band \u3092\u4f5c\u6210\u3057\u3001MurpleDeep \u306e\u30b5\u30d6\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u30012 \u3064\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3064 Visitor \u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u307e\u3057\u3087\u3046\u3002 1 \u3064\u306f Band \u306e\u5b50\u5b6b\u3092\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u51fa\u529b\u3059\u308b\u305f\u3081\u306e\u3082\u306e\u3067\u30012 \u3064\u76ee\u306f MurpleDeep \u3092\u51fa\u529b\u3059\u308b\u305f\u3081\u306e\u3082\u306e\u3067\u3059\u3002\u4e3b\u306a\u3053\u3068\u306f\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u540d\u524d (\u30b7\u30b0\u30cd\u30c1\u30e3) \u304c\u540c\u3058\u3067\u3001\u5f15\u6570\u304c\u30af\u30e9\u30b9\u306b\u3088\u3063\u3066\u306e\u307f\u7570\u306a\u308b\u3053\u3068\u3067\u3059\u3002 Band \u5f15\u6570\u3092\u6307\u5b9a\u3057\u305f\u4e2d\u9593\u51fa\u529b\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066 Visitor \u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3057\u3001MurpleDeep \u306e visit \u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306f Kotlin \u306e\u30b3\u30fc\u30c9\u3067\u3059\u3002 \u51fa\u529b\u306f &#8220;\u3053\u308c\u306f\u30d0\u30f3\u30c9 \u30af\u30e9\u30b9\u3067\u3059&#8220; \u3069\u3046\u3057\u3066\u305d\u3093\u306a\u3053\u3068\u304c\u53ef\u80fd\u306a\u306e\u3067\u3057\u3087\u3046\u304b?! \u306a\u305c\u3053\u308c\u304c\u8d77\u3053\u308b\u306e\u304b\u306f\u3001\u30ed\u30b7\u30a2\u8a9e\u3092\u542b\u3080\u591a\u304f\u306e\u8a18\u4e8b\u3067\u8ce2\u660e\u306a\u8a00\u8449\u3067\u8aac\u660e\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u30fc\u304c\u30b3\u30fc\u30c9\u3092\u3069\u306e\u3088\u3046\u306b\u8a8d\u8b58\u3059\u308b\u304b\u3092\u60f3\u50cf\u3057\u3066\u307f\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002\u304a\u305d\u3089\u304f\u3059\u3079\u3066\u304c\u3059\u3050\u306b\u660e\u3089\u304b\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u3002 \u554f\u984c\u306e\u89e3\u6c7a \u3053\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u306b\u306f\u591a\u304f\u306e\u89e3\u6c7a\u7b56\u304c\u3042\u308a\u307e\u3059\u3002\u6b21\u306b\u3001\u8a2a\u554f\u8005\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u305f\u89e3\u6c7a\u7b56\u3092\u691c\u8a0e\u3057\u307e\u3059\u3002Visitor \u5f15\u6570\u3092\u6301\u3064 accept \u30e1\u30bd\u30c3\u30c9\u3092\u62bd\u8c61\u30af\u30e9\u30b9\/\u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u8ffd\u52a0\u3057\u3001\u30e1\u30bd\u30c3\u30c9\u5185\u3067visitor.visit(this) \u3092\u547c\u3073\u51fa\u3057\u3001\u6b21\u306b accept \u30e1\u30bd\u30c3\u30c9\u306e\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\/\u5b9f\u88c5\u3092 MurpleDeep \u30af\u30e9\u30b9\u306b\u8ffd\u52a0\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u6c7a\u5b9a\u7684\u304b\u3064\u51b7\u9759\u306b DRY \u306b\u9055\u53cd\u3057\u3001\u518d\u5ea6\u6b21\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002 Visitor.visit(this).< br \/>\u6700\u7d42\u30b3\u30fc\u30c9: \u30bd\u30fc\u30b9 https:\/\/refactoring.guru\/ru\/\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\/\u8a2a\u554f\u8005-\u30c0\u30d6\u30eb\u30c7\u30a3\u30b9\u30d1\u30c3\u30c1<a class=\"more-link\" href=\"https:\/\/demensdeum.com\/blog\/ja\/2019\/04\/13\/visitor-pattern\/\">Continue reading <span class=\"screen-reader-text\">&#8220;\u8a2a\u554f\u8005\u306e\u30d1\u30bf\u30fc\u30f3&#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":"ja","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\/ja\/wp-json\/wp\/v2\/posts\/1790","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/demensdeum.com\/blog\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/demensdeum.com\/blog\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/ja\/wp-json\/wp\/v2\/comments?post=1790"}],"version-history":[{"count":38,"href":"https:\/\/demensdeum.com\/blog\/ja\/wp-json\/wp\/v2\/posts\/1790\/revisions"}],"predecessor-version":[{"id":3960,"href":"https:\/\/demensdeum.com\/blog\/ja\/wp-json\/wp\/v2\/posts\/1790\/revisions\/3960"}],"wp:attachment":[{"href":"https:\/\/demensdeum.com\/blog\/ja\/wp-json\/wp\/v2\/media?parent=1790"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/ja\/wp-json\/wp\/v2\/categories?post=1790"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/ja\/wp-json\/wp\/v2\/tags?post=1790"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}