{"id":1206,"date":"2011-10-25T02:06:10","date_gmt":"2011-10-24T17:06:10","guid":{"rendered":"http:\/\/codaholic.org\/?p=1206"},"modified":"2023-05-07T16:21:17","modified_gmt":"2023-05-07T07:21:17","slug":"javascriptcall%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%81%a8apply%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%81%ae%e5%9f%ba%e6%9c%ac%e7%9a%84%e3%81%aa%e5%8b%95%e4%bd%9c","status":"publish","type":"post","link":"https:\/\/codaholic.org\/?p=1206","title":{"rendered":"[JavaScript] call \u30e1\u30bd\u30c3\u30c9\u3068 apply \u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u52d5\u4f5c"},"content":{"rendered":"<p>JavaScript \u306e function \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u306f call \u30e1\u30bd\u30c3\u30c9\u3068 apply \u30e1\u30bd\u30c3\u30c9\u3068\u3044\u3046\u3082\u306e\u304c\u6a19\u6e96\u3067\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u4e0d\u601d\u8b70\u306a\u52d5\u4f5c\u3092\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u3042\u308a\u3001\u305d\u306e\u6709\u7528\u6027\u3092\u7406\u89e3\u3059\u308b\u306e\u306f\u96e3\u3057\u3044\u306e\u3067\u3059\u304c\u3001\u3044\u3064\u304b\u5f79\u306b\u7acb\u3064\u6642\u304c\u304f\u308b\u306f\u305a\uff1f\u306a\u306e\u3067\u8abf\u3079\u307e\u3057\u305f\u3002<\/p>\n<p><!--more--><\/p>\n<p class=\"subtitle\">call \u30e1\u30bd\u30c3\u30c9\u306e\u57fa\u672c\u7684\u306a\u52d5\u4f5c<\/p>\n<p>\u307e\u305a\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u95a2\u6570\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">var obj = {\n    say: 'Hello'\n}\n\nfunction hoge(){\n    alert(this.say);\n}\n<\/code><\/pre>\n<p>\u3053\u306e\u5f8c\u306b\u3001\u95a2\u6570 hoge \u3092\u5b9f\u884c\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">hoge(); \/\/undefined\n<\/code><\/pre>\n<p>\u5b9f\u884c\u7d50\u679c\u306f undefined \u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<br \/>\n\u3067\u306f\u3053\u3053\u3067 call \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u3068\u3001<\/p>\n<pre><code class=\"language-javascript\">hoge.call(obj); \/\/Hello\n<\/code><\/pre>\n<p><code>Hello<\/code> \u3068\u8868\u793a\u3055\u308c\u307e\u3059\u3002\u7d50\u679c\u7684\u306b call \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8 <code>obj<\/code> \u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306b <code>hoge<\/code> \u95a2\u6570\u304b\u3089\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\n\u3053\u306e\u52d5\u304d\u3092\u65e5\u672c\u8a9e\u306e\u6587\u7ae0\u3067\u8aac\u660e\u3059\u308b\u3068\u3001<strong>\u95a2\u6570 <code>hoge<\/code> \u306e this \u306b <code>obj<\/code> \u304c\u4e00\u6642\u7684\u306b\u30bb\u30c3\u30c8\u3055\u308c\u305f\u72b6\u614b\u3067\u95a2\u6570 <code>hoge<\/code> \u304c\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b<\/strong>\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p class=\"subtitle\">call \u30e1\u30bd\u30c3\u30c9\u306e\u7b2c\u4e8c\u5f15\u6570\u4ee5\u964d<\/p>\n<p>\u307e\u305f\u3001call \u30e1\u30bd\u30c3\u30c9\u306f\u5f15\u6570\u3092\u8907\u6570\u53d6\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7b2c\u4e00\u5f15\u6570\u306b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3001\u7b2c\u4e8c\u5f15\u6570\u4ee5\u964d\u306b\u300c\u95a2\u6570 hoge \u306b\u6e21\u3059\u5f15\u6570\u300d\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u52d5\u4f5c\u3092\u898b\u305f\u307b\u3046\u304c\u5206\u304b\u308a\u3084\u3059\u3044\u3067\u3059\u3002\u95a2\u6570 hoge \u304c\u5f15\u6570 arg \u3092\u53d6\u308b\u3088\u3046\u306b\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">var obj = {\n    say: 'Hello'\n}\n\nfunction hoge(arg){\n    alert(this.say + ', ' + arg);\n}\n<\/code><\/pre>\n<p>\u305d\u3057\u3066\u3053\u306e\u5f8c\u3001call \u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">hoge.call(obj, 'Suzuki'); \/\/Hello, Suzuki\n<\/code><\/pre>\n<p>\u305d\u3046\u3059\u308b\u3068\u300cHello, Suzuki\u300d\u3068\u8868\u793a\u3055\u308c\u307e\u3059\u3002call \u30e1\u30bd\u30c3\u30c9\u306e\u7b2c\u4e8c\u5f15\u6570\u304c\u95a2\u6570 hoge \u306e\u5f15\u6570\u3068\u3057\u3066\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u3002\u304f\u3069\u3044\u3067\u3059\u304c\u3064\u307e\u308a\u3001<strong>\u95a2\u6570 hoge \u306e this \u306b obj \u304c\u4e00\u6642\u7684\u306b\u30bb\u30c3\u30c8\u3055\u308c\u305f\u72b6\u614b\u3067\u95a2\u6570 hoge \u306b\u5f15\u6570 <code>Suzuki<\/code> \u3092\u6e21\u3057\u3066\u5b9f\u884c\u3057\u3066\u3044\u308b<\/strong>\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<p class=\"subtitle\">apply\u30e1\u30bd\u30c3\u30c9<\/p>\n<p>apply \u30e1\u30bd\u30c3\u30c9\u3082 call \u30e1\u30bd\u30c3\u30c9\u3068\u52d5\u4f5c\u304c\u4f3c\u3066\u3044\u307e\u3059\u3002apply \u30e1\u30bd\u30c3\u30c9\u306f\u7b2c\u4e8c\u5f15\u6570\u306b\u914d\u5217\u3092\u53d7\u3051\u53d6\u308a\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">var obj = {\n    say: 'Hello'\n}\n\nfunction hoge(arg1, arg2){\n    alert(this.say + ', ' + arg1 + ' and ' + arg2);\n}\n\nhoge.apply(obj, ['Suzuki', 'Tanaka']); \/\/Hello, Suzuki and Tanaka\n<\/code><\/pre>\n<p>\u3053\u308c\u3092\u5b9f\u884c\u3059\u308b\u3068\u300cHello, Suzuki and Tanaka\u300d\u3068\u8868\u793a\u3055\u308c\u307e\u3059\u3002apply \u30e1\u30bd\u30c3\u30c9\u306e\u7b2c\u4e8c\u5f15\u6570\u306b\u6e21\u3057\u305f\u914d\u5217\u304c\u95a2\u6570 hoge \u306e\u7b2c\u4e00\u5f15\u6570\u3001\u7b2c\u4e8c\u5f15\u6570\u3068\u3057\u3066\u5206\u89e3\u3055\u308c\u3066\u6e21\u3055\u308c\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>JavaScript \u306e function \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u306f call \u30e1\u30bd\u30c3\u30c9\u3068 apply \u30e1\u30bd\u30c3\u30c9\u3068\u3044\u3046\u3082\u306e\u304c\u6a19\u6e96\u3067\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u4e0d\u601d\u8b70\u306a\u52d5\u4f5c\u3092\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u3042\u308a\u3001\u305d\u306e\u6709\u7528\u6027\u3092\u7406\u89e3\u3059\u308b\u306e\u306f\u96e3\u3057\u3044\u306e\u3067\u3059\u304c\u3001\u3044\u3064\u304b [&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":[177,176,245],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8gd1W-js","_links":{"self":[{"href":"https:\/\/codaholic.org\/index.php?rest_route=\/wp\/v2\/posts\/1206"}],"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=1206"}],"version-history":[{"count":20,"href":"https:\/\/codaholic.org\/index.php?rest_route=\/wp\/v2\/posts\/1206\/revisions"}],"predecessor-version":[{"id":2625,"href":"https:\/\/codaholic.org\/index.php?rest_route=\/wp\/v2\/posts\/1206\/revisions\/2625"}],"wp:attachment":[{"href":"https:\/\/codaholic.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1206"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/codaholic.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1206"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/codaholic.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1206"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}