{"id":1159,"date":"2023-02-10T19:48:19","date_gmt":"2023-02-10T10:48:19","guid":{"rendered":"http:\/\/attacktube.com\/?p=1159"},"modified":"2023-02-11T08:30:52","modified_gmt":"2023-02-10T23:30:52","slug":"%e3%80%90javascript%e3%80%91foreach%e3%81%a8arguments","status":"publish","type":"post","link":"https:\/\/attacktube.com\/?p=1159","title":{"rendered":"\u3010JavaScript\u3011forEach\u3068arguments"},"content":{"rendered":"\n<p>\u914d\u5217\u306fforEach\u6587\u304c\u4f7f\u7528\u53ef\u80fd\u3067\u3042\u308b\u3002<br>\u3057\u304b\u3057\u3001\u914d\u5217\u3067\u306f\u306a\u304f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5834\u5408\u3001forEach\u6587\u306f\u4f7f\u7528\u4e0d\u53ef\u80fd\u3067\u3042\u308b\u3002<br>\u3053\u3093\u306a\u6642\u306f\u3001object.key()\u3092\u4f7f\u3063\u3066\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30ad\u30fc(\u30d7\u30ed\u30d1\u30c6\u30a3\u540d)\u306e\u914d\u5217\u3092\u901a\u5e38\u306e\u30eb\u30fc\u30d7\u3067\u53d6\u5f97\u3059\u308b\u306e\u3068\u540c\u3058\u9806\u5e8f\u3067\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<br>\u3064\u307e\u308aobject.key().forEach()\u3068\u3059\u308b\u3002<br><br>\u3059\u3079\u3066\u306e\u95a2\u6570\u306f\u5b9f\u884c\u3055\u308c\u308b\u3068\u304d\u306bthis\u3068arguments\u3092\u53d7\u3051\u53d6\u308b\u3002<br>arguments\u306flength\u30d7\u30ed\u30d1\u30c6\u30a3\u304c\u5b58\u5728\u3059\u308b\u305f\u3081\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u601d\u3044\u304d\u3084\u3001arguments\u306f\u914d\u5217\u306b\u4f3c\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3042\u308b\u3002\u3053\u306e\u305f\u3081arguments\u306b\u306fforEach\u6587\u304c\u4f7f\u7528\u4e0d\u53ef\u80fd\u3067\u3042\u308b\u3002<br><br>\u914d\u5217\u306e\u8981\u7d20\u3092\u53d6\u308a\u51fa\u3059for\u6587\u3092forEach\u6587\u306b\u66f8\u304d\u63db\u3048\u3092\u3057\u3066\u3044\u308b\u3068\u3001arguments\u306e\u5024\u3092\u53d6\u308a\u51fa\u3059for\u6587\u3092forEach\u6587\u306b\u66f8\u304d\u63db\u3048\u304c\u3067\u304d\u306a\u304b\u3063\u305f\u3002<br>\u8abf\u3079\u308b\u3068\u3001arguments\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3042\u308aforEach\u6587\u3092\u4f7f\u7528\u4e0d\u53ef\u80fd\u3060\u3063\u305f\u3002<br><br>\u300carguments\u306e\u5024\u3092\u53d6\u308a\u51fa\u3059\u300d\u306e\u8a00\u3044\u65b9\u306f\u6b63\u3057\u3044\u306e\u304b\uff1f\u3088\u304f\u5206\u304b\u3089\u3093\u3002<\/p>\n\n\n\n<!--more-->\n\n\n\n<pre><code>\nvar sum = function() {\n\n    var i, sum = 0;\n\n    console.log(\"Array.isArray(arguments) = \" + Array.isArray(arguments));\n    console.log(\"Array.isArray(Object.keys(arguments)) = \" + Array.isArray(Object.keys(arguments)));\n\n    Object.keys(arguments).forEach((key) =&gt; {\n        console.log('forEach\u6587 key: ' + key);\n        console.log(\"forEach\u6587 arguments[\" + key + \"] = \" + arguments[key]);\n    });\n\n    for (i = 0; i &lt; arguments.length; i += 1) {\n        sum += arguments[i];\n        console.log(\"for\u6587 arguments[\" + i + \"] = \" + arguments[i]);\n    }\n\n    return sum;\n};\n\nconsole.log(sum(4, 8, 15, 16, 23, 42));\/\/108\n\n\/*\n\nArray.isArray(arguments) = false\nArray.isArray(Object.keys(arguments)) = true\nforEach\u6587 key: 0\nforEach\u6587 arguments[0] = 4\nforEach\u6587 key: 1\nforEach\u6587 arguments[1] = 8\nforEach\u6587 key: 2\nforEach\u6587 arguments[2] = 15\nforEach\u6587 key: 3\nforEach\u6587 arguments[3] = 16\nforEach\u6587 key: 4\nforEach\u6587 arguments[4] = 23\nforEach\u6587 key: 5\nforEach\u6587 arguments[5] = 42\nfor\u6587 arguments[0] = 4\nfor\u6587 arguments[1] = 8\nfor\u6587 arguments[2] = 15\nfor\u6587 arguments[3] = 16\nfor\u6587 arguments[4] = 23\nfor\u6587 arguments[5] = 42\n108\n\n*\/\n<\/code><\/pre>\n\n\n\n<br>\n<script async=\"\" src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-3461056110605997\" crossorigin=\"anonymous\"><\/script>\n<ins class=\"adsbygoogle\" style=\"display:block; text-align:center;\" data-ad-layout=\"in-article\" data-ad-format=\"fluid\" data-ad-client=\"ca-pub-3461056110605997\" data-ad-slot=\"3137443461\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n<br>\n\n\n\n<script type=\"text\/javascript\">\njQuery(function($){\n$(\".jp-video\").hide();\n});\n<\/script>\n\n\n\n<p><a href=\"https:\/\/chusotsu-program.com\/js-object-foreach\/\">\u3010JS\u3011\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08\u9023\u60f3\u914d\u5217\uff09\u306b\u5bfe\u3057forEach\u3067\u30eb\u30fc\u30d7\u51e6\u7406\u3092\u304b\u3051\u308b\u65b9\u6cd5 | \u30d7\u30ed\u30b0\u30e9\u30de\u30fc\u306b\u306a\u3063\u305f \u300c\u4e2d\u5352\u300d \u7537\u306e\u30d6\u30ed\u30b0 (chusotsu-program.com)<\/a> ExternalLink<br><a rel=\"noreferrer noopener\" href=\"https:\/\/hb.afl.rakuten.co.jp\/ichiba\/298338d3.714ded4a.298338d4.abf99259\/?pc=https%3A%2F%2Fitem.rakuten.co.jp%2Fbook%2F5940391%2F&amp;link_type=text&amp;ut=eyJwYWdlIjoiaXRlbSIsInR5cGUiOiJ0ZXh0Iiwic2l6ZSI6IjI0MHgyNDAiLCJuYW0iOjEsIm5hbXAiOiJyaWdodCIsImNvbSI6MSwiY29tcCI6ImRvd24iLCJwcmljZSI6MSwiYm9yIjoxLCJjb2wiOjEsImJidG4iOjEsInByb2QiOjAsImFtcCI6ZmFsc2V9\" target=\"_blank\">JavaScript\uff1athe\u3000good\u3000parts \u300c\u826f\u3044\u30d1\u30fc\u30c4\u300d\u306b\u3088\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9 [ \u30c0\u30b0\u30e9\u30b9\u30fb\u30af\u30ed\u30d5\u30a9\u30fc\u30c9 ]<\/a> \u3000ExternalLink P36<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u914d\u5217\u306fforEach\u6587\u304c\u4f7f\u7528\u53ef\u80fd\u3067\u3042\u308b\u3002\u3057\u304b\u3057\u3001\u914d\u5217\u3067\u306f\u306a\u304f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5834\u5408\u3001forEach\u6587\u306f\u4f7f\u7528\u4e0d\u53ef\u80fd\u3067\u3042\u308b\u3002\u3053\u3093\u306a\u6642\u306f\u3001object.key()\u3092\u4f7f\u3063\u3066\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30ad\u30fc(\u30d7\u30ed\u30d1\u30c6\u30a3\u540d)\u306e\u914d\u5217\u3092\u901a\u5e38\u306e\u30eb\u30fc\u30d7\u3067\u53d6\u5f97 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3],"tags":[],"class_list":["post-1159","post","type-post","status-publish","format-standard","hentry","category-javascript"],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/posts\/1159","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1159"}],"version-history":[{"count":12,"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/posts\/1159\/revisions"}],"predecessor-version":[{"id":1184,"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/posts\/1159\/revisions\/1184"}],"wp:attachment":[{"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1159"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1159"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1159"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}