{"blog_title":"mattintosh note","image_url":null,"width":"100%","version":"1.0","blog_url":"https://mattintosh-note.jp/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fmattintosh-note.jp%2Fentry%2F20151128%2F1448639791\" title=\"JavaScript memo - mattintosh note\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","url":"https://mattintosh-note.jp/entry/20151128/1448639791","title":"JavaScript memo","description":"\u914d\u5217\u306b\u305d\u306e\u8981\u7d20\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u306e\u306b\u30eb\u30fc\u30d7\u3092\u4f7f\u3046\u306e\u304c\u5acc\u3060\u3063\u305f\u306e\u3067\uff08\u6570\u3082\u5c11\u306a\u304b\u3063\u305f\u3057\uff09switch \u3067\u5bfe\u5fdc\u3057\u3066\u3044\u305f\u3051\u3069\u3001\u306a\u3093\u3068\u306a\u304f\u4e0d\u4fbf\u306a\u6c17\u304c\u3057\u3066\u304d\u305f\u3002 \u30cf\u30c3\u30b7\u30e5\u306e\u5834\u5408\u306f in \u3067\u305d\u306e\u30ad\u30fc\u304c\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308b\u3088\u3046\u306a\u306e\u3067\u3053\u308c\u3092\u4f7f\u3063\u3066\u307f\u305f\u3002 var h = { \"T2\": null, \"T3\": null, }; var a = [\"T1\", \"T2\", \"T3\", \"T4\"]; for (var i = 0; a[i] != null; i++) { if (a[i] in h) alert(\"h has \" + a[i]); } \u3044\u3061\u3044\u3061 \"key\": null \u3092\u2026","height":"190","author_url":"https://blog.hatena.ne.jp/mattintosh4/","type":"rich","author_name":"mattintosh4","provider_url":"https://hatena.blog","published":"2015-11-28 00:56:31","provider_name":"Hatena Blog","categories":["HTML","JavaScript"]}