{"id":5121,"date":"2023-11-22T22:43:39","date_gmt":"2023-11-22T13:43:39","guid":{"rendered":"http:\/\/attacktube.com\/?p=5121"},"modified":"2024-03-11T06:15:00","modified_gmt":"2024-03-10T21:15:00","slug":"%e3%80%90javascript%e3%80%91%e4%bd%bf%e7%94%a8%e3%81%97%e3%81%aa%e3%81%84%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89","status":"publish","type":"post","link":"https:\/\/attacktube.com\/?p=5121","title":{"rendered":"JavaScript The Good Parts \u899a\u66f8 \u4f7f\u7528\u3057\u306a\u3044\u30e1\u30bd\u30c3\u30c9"},"content":{"rendered":"\n<p>\u30071\u500b\u76ee<br>string.substring(start,end)\u306e\u4ee3\u308f\u308a\u306bstring.slice(start,end)\u3092\u4f7f\u3046\u3053\u3068\u3002<\/p>\n\n\n\n<!--more-->\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<p>\u6b21\u306b\u3088\u3046\u306b\u66f8\u7c4d\u306b\u8f09\u3063\u3066\u3044\u305f\u3002<br>string.substring(start,end)\u306f\u4f7f\u308f\u306a\u304f\u3066OK\u3002<br><br>\u2014<a 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\" rel=\"noreferrer noopener\">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>\u00a0\u3000\u00a0P106 \u3053\u3053\u3089\u304b\u3089\u2013<br>string.substring(start,end)<br>substring\u30e1\u30bd\u30c3\u30c9\u306f\u3001slice\u30e1\u30bd\u30c3\u30c9\u3068\u540c\u3058\u3060\u304c\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u8ca0\u306e\u5024\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u3002substring\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u308f\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u7406\u7531\u306f1\u3064\u3082\u306a\u3044\u3002\u4ee3\u308f\u308a\u306bslice\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3048\u3070\u3088\u3044\u3060\u308d\u3046\u3002<br>\u2014<a 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\" rel=\"noreferrer noopener\">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>\u00a0\u3000\u00a0P106 \u3053\u3053\u307e\u3067\u2013<br><br>\u30072\u500b\u76ee<br>Object.prototype.valueOf()\u30e1\u30bd\u30c3\u30c9\u306f\u4f7f\u308f\u306a\u304f\u3066\u3044\u3044\u304b\u306a\u3002<br>\u6b21\u306e\u3088\u3046\u306b\u30e9\u30c3\u30d1\u30fc\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u3046\u306a\u3068\u3044\u3046\u3053\u3068\u306fvalueOf\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u305f\u306a\u3044\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u307f\u3067\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3059\u308b\u3068\u3044\u3046\u3053\u3068\u306b\u306a\u308b\u3002\u3057\u305f\u304c\u3063\u3066\u3001valueOf\u30e1\u30bd\u30c3\u30c9\u306f\u4f7f\u308f\u306a\u3044\u3068\u3044\u3046\u3053\u3068\u3060\u306a\u3002<br>\u30e9\u30c3\u30d1\u30fc\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u4f55\u304b\u306f\u3088\u304f\u5206\u304b\u3063\u3066\u3044\u306a\u3044\u3002<br><br>\u2014<a 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\" rel=\"noreferrer noopener\">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>\u00a0\u3000\u00a0P132 \u3053\u3053\u3089\u304b\u3089\u2013<br>JavaScript\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3001\u305d\u308c\u305e\u308c\u306e\u5909\u6570\u578b\u306e\u30e9\u30c3\u30d1\u30fc\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u308b\u3002<br>new Boolean(false)<br>\u3053\u308c\u306f\u3001valueOf\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3063\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\u3059\u308b\u3002valueOf\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u30e9\u30c3\u30d7\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3092\u8fd4\u3059\u6a5f\u80fd\u3092\u6301\u3063\u3066\u3044\u308b\u3002\u3057\u304b\u3057\u3001\u3053\u306e\u30e9\u30c3\u30d1\u30fc\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3069\u3046\u8003\u3048\u3066\u3082\u4e0d\u8981\u3067\u3001\u6642\u306b\u306f\u6df7\u4e71\u3092\u3082\u3082\u305f\u3089\u3057\u3066\u3057\u307e\u3059\u3002<br>\u2014<a 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\" rel=\"noreferrer noopener\">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>\u00a0\u3000\u00a0P132 \u3053\u3053\u307e\u3067\u2013<\/p>\n\n\n\n<script type=\"text\/javascript\">\njQuery(function($){\n$(\".jp-video\").hide();\n});\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>\u30071\u500b\u76eestring.substring(start,end)\u306e\u4ee3\u308f\u308a\u306bstring.slice(start,end)\u3092\u4f7f\u3046\u3053\u3068\u3002<\/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-5121","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\/5121","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=5121"}],"version-history":[{"count":6,"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/posts\/5121\/revisions"}],"predecessor-version":[{"id":5341,"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/posts\/5121\/revisions\/5341"}],"wp:attachment":[{"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5121"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5121"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5121"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}