{"id":3927,"date":"2023-08-14T17:23:49","date_gmt":"2023-08-14T08:23:49","guid":{"rendered":"https:\/\/dennie.tokyo\/it\/?p=3927"},"modified":"2023-08-14T17:24:43","modified_gmt":"2023-08-14T08:24:43","slug":"%e3%80%90go%e3%80%91switch%e5%9e%8b%e3%82%a2%e3%82%b5%e3%83%bc%e3%82%b7%e3%83%a7%e3%83%b3","status":"publish","type":"post","link":"https:\/\/dennie.tokyo\/it\/?p=3927","title":{"rendered":"\u3010Go\u3011switch\u578b\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3"},"content":{"rendered":"\n<p>\u578b\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\u306fswitch\u3092\u4f7f\u7528\u3057\u3066\u3001\u8907\u6570\u306e\u3069\u306e\u578b\u306b\u4e00\u81f4\u3059\u308b\u304b\u3092\u5224\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<!--more-->\n\n\n\n<p>\u578b\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\u306f\u4ee5\u4e0b\u3092\u53c2\u8003\u306b\u3057\u3066\u4e0b\u3055\u3044\u3002<\/p>\n\n\n\n<div class=\"title_box\"><span class=\"box-title\">\u53c2\u8003<\/span>\n<p><\/p>\n<p><a href=\"https:\/\/dennie.tokyo\/it\/?p=3916\" rel=\"noopener\" target=\"_blank\">\u3010Go\u3011\u578b\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3<\/a><\/p>\n<\/div>\n\n\n\n<h1 class=\"wp-block-heading\">switch\u578b\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3<\/h1>\n\n\n\n<p>nil\u304b\u3069\u3046\u304b\u306e\u5224\u5b9a\u3082\u3067\u304d\u308b\u3088\u3046\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>package main\n\nimport (\n\t&quot;fmt&quot;\n)\n\n\/\/ \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9a\u7fa9\ntype myInterface interface {\n\tgetName() string\n}\n\n\/\/ \u72ac\u306e\u69cb\u9020\u4f53\u306e\u5b9a\u7fa9\ntype dog struct {\n\tname string\n}\n\n\/\/ \u72ac\u306e\u30e1\u30bd\u30c3\u30c8\u5b9a\u7fa9\nfunc (d dog) getName() string {\n\treturn d.name\n}\n\n\/\/ \u732b\u306e\u69cb\u9020\u4f53\u306e\u5b9a\u7fa9\ntype cat struct {\n\tname string\n}\n\n\/\/ \u732b\u306e\u30e1\u30bd\u30c3\u30c8\u5b9a\u7fa9\nfunc (c cat) getName() string {\n\treturn c.name\n}\n\nfunc (c cat) cry() string {\n\treturn &quot;\u306b\u3083\u30fc&quot;\n}\n\nfunc main() {\n\td := dog{}\n\td.name = &quot;dog_name&quot;\n\tdetermineType(d) \/\/ dog_name \u304c\u8868\u793a\u3055\u308c\u308b\n\n\tc := cat{}\n\tc.name = &quot;cat_name&quot;\n\tdetermineType(c) \/\/ \u306b\u3083\u30fc \u304c\u8868\u793a\u3055\u308c\u308b\n\n\tvar m myInterface\n\tdetermineType(m) \/\/ nil \u304c\u8868\u793a\u3055\u308c\u308b\n}\n\nfunc determineType(m myInterface) {\n\n\t\/\/ switch\u578b\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\u3002\n\tswitch v := m.(type) {\n\tcase nil:\n\t\tfmt.Printf(&quot;nil\\n&quot;)\n\tcase dog:\n\t\tfmt.Printf(v.getName() + &quot;\\n&quot;)\n\tcase cat:\n\t\tfmt.Printf(v.cry() + &quot;\\n&quot;)\n\tdefault:\n\t\tfmt.Printf(&quot;\u30c7\u30d5\u30a9\u30eb\u30c8\\n&quot;)\n\t}\n\n}\n<\/code><\/pre><\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u578b\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\u306fswitch\u3092\u4f7f\u7528\u3057\u3066\u3001\u8907\u6570\u306e\u3069\u306e\u578b\u306b\u4e00\u81f4\u3059\u308b\u304b\u3092\u5224\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"author":1,"featured_media":5,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[33],"tags":[],"class_list":["post-3927","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-go"],"_links":{"self":[{"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/posts\/3927","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3927"}],"version-history":[{"count":2,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/posts\/3927\/revisions"}],"predecessor-version":[{"id":3929,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/posts\/3927\/revisions\/3929"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/media\/5"}],"wp:attachment":[{"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3927"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3927"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3927"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}