{"id":1704,"date":"2012-06-11T09:54:56","date_gmt":"2012-06-11T00:54:56","guid":{"rendered":"http:\/\/codaholic.org\/?p=1704"},"modified":"2023-05-07T15:00:45","modified_gmt":"2023-05-07T06:00:45","slug":"javascriptfor%e6%a7%8b%e6%96%87%e5%86%85%e3%81%a7%e9%96%a2%e6%95%b0%e3%83%aa%e3%83%86%e3%83%a9%e3%83%ab%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%97%e3%81%9f%e6%99%82%e3%81%ae%e3%82%b9%e3%82%b3%e3%83%bc","status":"publish","type":"post","link":"https:\/\/codaholic.org\/?p=1704","title":{"rendered":"[JavaScript] for \u69cb\u6587\u5185\u3067\u95a2\u6570\u30ea\u30c6\u30e9\u30eb\u3092\u4f7f\u7528\u3057\u305f\u6642\u306e\u30b9\u30b3\u30fc\u30d7\u306b\u3064\u3044\u3066\u306e\u6ce8\u610f\u70b9"},"content":{"rendered":"<p>JavaScript \u3067\u306f\u95a2\u6570\u30ea\u30c6\u30e9\u30eb\u3092\u5909\u6570\u306b\u4ee3\u5165\u3059\u308b\u3053\u3068\u3067\u3001\u305d\u306e\u5909\u6570\u3092\u95a2\u6570\u3068\u3057\u3066\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3068\u3066\u3082\u8208\u5473\u6df1\u3044\u4ed5\u7d44\u307f\u3067\u3059\u304c\u3001\u7406\u89e3\u3059\u308b\u306e\u306b\u3082\u6642\u9593\u304c\u304b\u304b\u308a\u307e\u3057\u305f\u3002\u7279\u306b for \u69cb\u6587\u5185\u3067\u95a2\u6570\u30ea\u30c6\u30e9\u30eb\u3092\u4f7f\u3063\u3066\u51e6\u7406\u3092\u5b9a\u7fa9\u3057\u305f\u5834\u5408\u306b\u3001\u60f3\u5b9a\u3068\u5168\u304f\u9055\u3063\u305f\u52d5\u4f5c\u3092\u3057\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n<p><!--more--><\/p>\n<p>\u5177\u4f53\u7684\u306b\u306f\u4e0b\u8a18\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u3067\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">var f = [];\nfor (var x = 0; x &lt; 3; x++){\n   f[x] = function () { return x; };\n}\nconsole.log(f[1]()); \/\/ 3 \u3068\u8868\u793a\u3055\u308c\u308b\u3002\n<\/code><\/pre>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3092\u6700\u521d\u306b\u898b\u305f\u6642\u3001\u79c1\u306e\u982d\u306e\u4e2d\u3067\u306f 1 \u304c\u8868\u793a\u3055\u308c\u308b\u3068\u3070\u304b\u308a\u601d\u3063\u3066\u3044\u307e\u3057\u305f\u3002for \u69cb\u6587\u3067\u4f7f\u3063\u3066\u3044\u308b\u5909\u6570\u304c\u30ab\u30a6\u30f3\u30c8\u30a2\u30c3\u30d7\u3055\u308c\u306a\u304c\u3089\u3001\u5b9a\u7fa9\u3055\u308c\u308b\u3068\u3044\u3046\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002\u3064\u307e\u308a\u306f\u4e0b\u8a18\u3068\u540c\u69d8\u306e\u51e6\u7406\u304c\u884c\u308f\u308c\u308b\u3068\u601d\u3044\u8fbc\u3093\u3067\u3044\u307e\u3057\u305f\u3002<\/p>\n<pre><code class=\"language-javascript\">var f = [];\nf[0] = function () { return 0; };\nf[1] = function () { return 1; };\nf[2] = function () { return 2; };\nconsole.log(f[1]()); \/\/ 1 \u3068\u8868\u793a\u3055\u308c\u308b\u3002\n<\/code><\/pre>\n<p>\u3057\u304b\u3057\u306a\u304c\u3089\u3001\u73fe\u5b9f\u306f\u9055\u3063\u3066\u3044\u3066 for \u69cb\u6587\u3092\u4f7f\u3046\u3068\u30eb\u30fc\u30d7\u304c\u5b8c\u4e86\u3057\u305f\u3042\u3068\u306e 3 \u304c\u8868\u793a\u3055\u308c\u308b\u306e\u3067\u3059\u3002\u3053\u308c\u306f\u306a\u305c\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<p>\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u306e\u8a18\u4e8b\u3092\u8abf\u3079\u305f\u7d50\u679c\u3001\u300c\u30b9\u30b3\u30fc\u30d7\u300d\u304c\u30dd\u30a4\u30f3\u30c8\u3067\u3042\u308b\u3053\u3068\u306b\u305f\u3069\u308a\u7740\u304d\u307e\u3057\u305f\u3002<\/p>\n<p>\u95a2\u6570\u30ea\u30c6\u30e9\u30eb\u3067\u95a2\u6570\u3092\u5b9a\u7fa9\u3059\u308b\u3068\u3001\u8a18\u8ff0\u3057\u305f\u5834\u6240\u306e\u30b9\u30b3\u30fc\u30d7\u3067\u5b9a\u7fa9\u3055\u308c\u307e\u3059\u3002<code>function () { return x; }<\/code> \u304c\u8a18\u8ff0\u3055\u308c\u305f\u3068\u304d\u306b\u306f\u3001\u3053\u306e\u95a2\u6570\u5185\u306b x \u306f\u3042\u308a\u307e\u305b\u3093\u306e\u3067\u3001\u4e00\u3064\u5916\u5074\u306e\u30b9\u30b3\u30fc\u30d7\u3092\u63a2\u3057\u306b\u884c\u304d\u307e\u3059\u3002for\u69cb\u6587\u5185\u306f\u30b9\u30b3\u30fc\u30d7\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u306e\u3067\u3001\u7d50\u679c\u7684\u306b\u300c\u95a2\u6570\u304c\u5b9f\u884c\u3055\u308c\u305f\u3089\u30b0\u30ed\u30fc\u30d0\u30eb\u30b9\u30b3\u30fc\u30d7\u306e x \u3092\u53c2\u7167\u3057\u306b\u3044\u304f\u300d\u3068\u3044\u3046\u52d5\u4f5c\u304cf[0]\u3001f[1]\u3001f[2]\u306b\u5b9a\u7fa9\u3055\u308c\u307e\u3059\u3002\uff08\u52d5\u4f5c\u306f\u5168\u90e8\u540c\u3058\uff01\uff09\u3053\u308c\u3089\u306e\u95a2\u6570\u306e\u5b9f\u884c\u6642\u306e\u30b0\u30ed\u30fc\u30d0\u30eb\u30b9\u30b3\u30fc\u30d7\u306b\u3042\u308b x \u306ffor\u69cb\u6587\u3067\u30ab\u30a6\u30f3\u30bf\u30fc\u3068\u3057\u3066\u4f7f\u3044\u7d42\u308f\u3063\u305f\u5909\u6570\u3067\u3059\u304b\u3089\u3001f[0]\u3001f[1]\u3001f[2]\u3069\u308c\u3092\u5b9f\u884c\u3057\u3066\u3082 3 \u304c\u8fd4\u3055\u308c\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3067\u306f\u3001\u6b21\u306e\u7591\u554f\u3068\u3057\u3066 <code>function () { return x; }<\/code> \u306e\u306a\u304b\u306e x \u3092\u3001for \u69cb\u6587\u3067\u4f7f\u3063\u3066\u3044\u308b x \u3092\u53c2\u7167\u3059\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u5834\u5408\u306f\u3069\u3046\u3057\u305f\u3089\u3044\u3044\u306e\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<div class=\"subtitle\">\u5373\u6642\u95a2\u6570\u3067\u30b9\u30b3\u30fc\u30d7\u3092\u4f5c\u308b<\/div>\n<p>\u5373\u6642\u95a2\u6570\u3092\u4f7f\u3046\u3068\u30b9\u30b3\u30fc\u30d7\u3092\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305d\u306e\u5373\u6642\u9593\u6570\u306b\u5f15\u6570\u3068\u3057\u3066\u3001\u30ab\u30a6\u30f3\u30bf\u30fc\u3067\u4f7f\u308f\u308c\u3066\u3044\u308b x \u3092\u6e21\u3059\u3053\u3068\u3067\u3001<code>f[x] = function () { return x; };<\/code>\u3000\u3067\u4f7f\u308f\u308c\u3066\u3044\u308b\u4e00\u3064\u5916\u5074\u306e\u30b9\u30b3\u30fc\u30d7\u306b\u3001\u30ab\u30a6\u30f3\u30bf\u30fc\u3067\u4f7f\u308f\u308c\u3066\u3044\u308b x \u304c\u5b58\u5728\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001f<a href=\"\">x<\/a>\u306e\u5b9f\u884c\u6642\u306b\u306f x \u304c 0\u30011\u30012 \u306e\u30b9\u30b3\u30fc\u30d7\u3092\u305d\u308c\u305e\u308c\u53c2\u7167\u3057\u306b\u3044\u304d\u307e\u3059\u306e\u3067\u3001\u671f\u5f85\u901a\u308a\u306e\u7d50\u679c\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">var f = [];\nfor (var x = 0; x &lt; 3; x++){\n    (function(x){\n        f[x] = function () { return x; };\n    })(x);\n}\nconsole.log(f[1]()); \/\/ 1 \u3068\u8868\u793a\u3055\u308c\u308b\u3002\n<\/code><\/pre>\n<div class=\"subtitle\">with \u69cb\u6587\u3067\u30b9\u30b3\u30fc\u30d7\u3092\u4f5c\u308b<\/div>\n<p>with\u69cb\u6587\u3092\u4f7f\u3046\u3053\u3068\u3067\u5373\u6642\u95a2\u6570\u3092\u4f7f\u3063\u305f\u5834\u5408\u3068\u540c\u3058\u3088\u3046\u306a\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002with({x:x}){ &#8230; } \u3068\u3059\u308b\u3053\u3068\u3067\u3001with\u306e\u5916\u5074\u306e x \u3092with\u306e\u5185\u5074\u306e x \u3068\u3057\u3066\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u30b9\u30b3\u30fc\u30d7\u3092\u4f5c\u308a\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u5916\u5074\u306e x \u306ffor\u69cb\u6587\u306b\u3088\u3063\u3066\u30ab\u30a6\u30f3\u30c8\u30a2\u30c3\u30d7\u3055\u308c\u3066\u3044\u307e\u3059\u304b\u3089\u3001with({x:0}){ &#8230; }\u3001with({x:1}){ &#8230; }\u3001with({x:2}){ &#8230; }\u306e3\u56de\u30b9\u30b3\u30fc\u30d7\u304c\u4f5c\u6210\u3055\u308c\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u5b9f\u884c\u6642\u306b\u306f <code>f[x] = function () { return x; };<\/code> \u306e\u5b9a\u7fa9\u6642\u306b\u4e00\u3064\u5916\u5074\u3067\u4f7f\u308f\u308c\u3066\u3044\u308b\u30b9\u30b3\u30fc\u30d7\u306e x \u3092\u53c2\u7167\u3057\u306b\u3044\u304f\u3053\u3068\u306b\u306a\u308b\u305f\u3081\u3001\u5373\u6642\u95a2\u6570\u306e\u3068\u304d\u3068\u540c\u69d8\u306e\u7d50\u679c\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">var f = [];\nfor (var x = 0; x &lt; 3; x++){\n    with({x:x}){\n        f[x] = function () { return x; };\n    }\n}\nconsole.log(f[1]()); \/\/ 1 \u3068\u8868\u793a\u3055\u308c\u308b\u3002\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>JavaScript \u3067\u306f\u95a2\u6570\u30ea\u30c6\u30e9\u30eb\u3092\u5909\u6570\u306b\u4ee3\u5165\u3059\u308b\u3053\u3068\u3067\u3001\u305d\u306e\u5909\u6570\u3092\u95a2\u6570\u3068\u3057\u3066\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3068\u3066\u3082\u8208\u5473\u6df1\u3044\u4ed5\u7d44\u307f\u3067\u3059\u304c\u3001\u7406\u89e3\u3059\u308b\u306e\u306b\u3082\u6642\u9593\u304c\u304b\u304b\u308a\u307e\u3057\u305f\u3002\u7279\u306b for \u69cb\u6587\u5185\u3067\u95a2\u6570\u30ea\u30c6\u30e9\u30eb\u3092\u4f7f\u3063\u3066\u51e6\u7406\u3092\u5b9a\u7fa9 [&hellip;]<\/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":[245,210,211,212],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8gd1W-ru","_links":{"self":[{"href":"https:\/\/codaholic.org\/index.php?rest_route=\/wp\/v2\/posts\/1704"}],"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=1704"}],"version-history":[{"count":17,"href":"https:\/\/codaholic.org\/index.php?rest_route=\/wp\/v2\/posts\/1704\/revisions"}],"predecessor-version":[{"id":2620,"href":"https:\/\/codaholic.org\/index.php?rest_route=\/wp\/v2\/posts\/1704\/revisions\/2620"}],"wp:attachment":[{"href":"https:\/\/codaholic.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1704"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/codaholic.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1704"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/codaholic.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1704"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}