{"id":1101,"date":"2011-09-07T02:34:12","date_gmt":"2011-09-06T17:34:12","guid":{"rendered":"http:\/\/codaholic.org\/?p=1101"},"modified":"2023-05-07T16:36:20","modified_gmt":"2023-05-07T07:36:20","slug":"javascriptin%e6%bc%94%e7%ae%97%e5%ad%90%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9","status":"publish","type":"post","link":"https:\/\/codaholic.org\/?p=1101","title":{"rendered":"[JavaScript] in \u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u65b9"},"content":{"rendered":"<p>JavaScript \u306e in \u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u65b9\u3092\u8abf\u3079\u307e\u3057\u305f\u306e\u3067\u305d\u306e\u8a18\u9332\u3092\u6295\u7a3f\u3057\u307e\u3059\u3002in \u6f14\u7b97\u5b50\u306f 2 \u3064\u306e\u4f7f\u3044\u65b9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p><!--more--><\/p>\n<p class=\"subtitle\">1. \u3042\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u53c8\u306f\u30e1\u30bd\u30c3\u30c9\u304c\u3042\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u8abf\u3079\u308b<\/p>\n<pre><code class=\"language-javascript\">var obj = {\n    greeting : 'Hello'\n}\nalert('greeting' in obj); \/\/true\nalert('hoge' in obj); \/\/false\n<\/code><\/pre>\n<p>A in B\u3068\u3044\u3046\u3088\u3046\u306b\u8a18\u8ff0\u3059\u308b\u3068\u3001A\u304c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8B\u306b\u5b58\u5728\u3057\u3066\u3044\u308b\u5834\u5408\u306ftrue\u304c\u3001\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306ffalse\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001\u914d\u5217\u306b\u5bfe\u3057\u3066\u305d\u306e\u8981\u7d20\u756a\u53f7\u304c\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u3082\u8abf\u3079\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u3067\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">var hoge = ['morning', 'noon', 'evening'];\nalert(0 in hoge); \/\/true\nalert(1 in hoge); \/\/true\nalert(2 in hoge); \/\/true\nalert(3 in hoge); \/\/false\n<\/code><\/pre>\n<p class=\"subtitle\">2. for\u69cb\u6587\u3068\u4e00\u7dd2\u306b\u4f7f\u3046\u3053\u3068\u3067\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u5185\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u6570\u306b\u5fdc\u3058\u3066\u30eb\u30fc\u30d7\u3055\u305b\u308b<\/p>\n<pre><code class=\"language-javascript\">var obj = {\n    asa : 'morning',\n    hiru : 'noon',\n    yoru : 'evening'\n}\nfor(var i in obj){\n    document.write(i + '&lt;br \/&gt;');\n}\n<\/code><\/pre>\n<p><strong>\u5b9f\u884c\u7d50\u679c<\/strong><\/p>\n<pre><code>asa\nhiru\nyoru\n<\/code><\/pre>\n<p>for \u69cb\u6587\u3068\u4e00\u7dd2\u306b\u4f7f\u7528\u3059\u308b\u3068\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6301\u3063\u3066\u3044\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u6570\u3060\u3051\u30eb\u30fc\u30d7\u3092\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>JavaScript \u306e in \u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u65b9\u3092\u8abf\u3079\u307e\u3057\u305f\u306e\u3067\u305d\u306e\u8a18\u9332\u3092\u6295\u7a3f\u3057\u307e\u3059\u3002in \u6f14\u7b97\u5b50\u306f 2 \u3064\u306e\u4f7f\u3044\u65b9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[5],"tags":[245],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8gd1W-hL","_links":{"self":[{"href":"https:\/\/codaholic.org\/index.php?rest_route=\/wp\/v2\/posts\/1101"}],"collection":[{"href":"https:\/\/codaholic.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/codaholic.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/codaholic.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/codaholic.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1101"}],"version-history":[{"count":9,"href":"https:\/\/codaholic.org\/index.php?rest_route=\/wp\/v2\/posts\/1101\/revisions"}],"predecessor-version":[{"id":2633,"href":"https:\/\/codaholic.org\/index.php?rest_route=\/wp\/v2\/posts\/1101\/revisions\/2633"}],"wp:attachment":[{"href":"https:\/\/codaholic.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1101"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/codaholic.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1101"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/codaholic.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1101"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}