{"id":1142,"date":"2023-02-06T18:06:19","date_gmt":"2023-02-06T09:06:19","guid":{"rendered":"http:\/\/attacktube.com\/?p=1142"},"modified":"2023-02-11T22:29:28","modified_gmt":"2023-02-11T13:29:28","slug":"%e3%80%90javascript%e3%80%91array-prototype-concat%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%81%a8array-prototype-reduce%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89","status":"publish","type":"post","link":"https:\/\/attacktube.com\/?p=1142","title":{"rendered":"\u3010JavaScript\u3011Array.prototype.concat\u30e1\u30bd\u30c3\u30c9\u3068Array.prototype.reduce()\u30e1\u30bd\u30c3\u30c9"},"content":{"rendered":"\n<p>concat\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u81ea\u5206\u81ea\u8eab\u306e\u914d\u5217\u3068\u5f15\u6570\u3068\u3057\u3066\u6e21\u3055\u308c\u305f\u8981\u7d20\u3092\u9023\u7d50\u3057\u3066\u3001\u65b0\u3057\u3044\u30b3\u30d4\u30fc\u914d\u5217\u3092\u751f\u6210\u3059\u308b\u3002\u3082\u3057\u5f15\u6570\u3068\u3057\u3066\u6e21\u3055\u308c\u305f\u8981\u7d20\u304c\u914d\u5217\u306a\u3089\u3001\u305d\u3053\u306b\u542b\u307e\u308c\u308b\u8981\u7d20\u304c\u305d\u308c\u305e\u308c\u65b0\u3057\u304f\u4f5c\u3089\u308c\u305f\u914d\u5217\u306b\u8ffd\u52a0\u3055\u308c\u308b\u3002<br>concat\u30e1\u30bd\u30c3\u30c9\u3068\u30b9\u30d7\u30ec\u30c3\u30c8\u69cb\u6587(Spread syntax)\u3068reduce\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u30682\u6b21\u5143\u914d\u5217\u30921\u6b21\u5143\u914d\u5217\u306b\u5909\u63db\u3067\u304d\u308b\u3002<br>\u7c21\u5358\u306b2\u6b21\u5143\u914d\u5217\u30921\u6b21\u5143\u914d\u5217\u306b\u5909\u63db\u53ef\u80fd\u306a\u3053\u3068\u306b\u9a5a\u3044\u305f\u308f\u3002<br><br>concatenate (\u4ed6)\u300a\u30b3\u300b[\u6587\u5b57\u306a\u3069\u3092]\u9023\u7d50\u3055\u305b\u308b<br>concatenation (\u540d)(U)\u9023\u7d9a,\u9023\u7d50<br>spread (\u81ea)\u5e83\u304c\u308b (\u4ed6)\u3092\u5e83\u3052\u308b<\/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<pre><code>\nvar a = ['a', 'b', 'c'];\nvar b = ['x', 'y', 'z'];\nvar c = a.concat(b, \"hello\");\n\nconsole.log(\"c = \" + c);\n\nconst data = [\n  [1, 2, 3], [4, 5, 6], [7, 8, 9]\n];\n\n\/\/2\u6b21\u5143\u914d\u5217\u30921\u6b21\u5143\u914d\u5217\u306b\u5909\u63db\u3059\u308b\nlet result = data.reduce((newArr, elem) =&gt; {\n  \/\/\u30b9\u30d7\u30ec\u30c3\u30c8\u69cb\u6587\u3092\u4f7f\u7528\u3059\u308b\n  return [...newArr, ...elem];\n}, []);\n\nconsole.log(\"result = \" + result);\n\n\/\/2\u6b21\u5143\u914d\u5217\u30921\u6b21\u5143\u914d\u5217\u306b\u5909\u63db\u3059\u308b\nresult = data.reduce((newArr, elem) =&gt; {\n  \/\/concat\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\n  return  newArr.concat(elem)\n}, []);\n\nconsole.log(\"result = \" + result);\n\/*\n\nc = a,b,c,x,y,z,hello\nresult = 1,2,3,4,5,6,7,8,9\nresult = 1,2,3,4,5,6,7,8,9\n\n*\/\n<\/code><\/pre>\n\n\n\n<script type=\"text\/javascript\">\njQuery(function($){\n$(\".jp-video\").hide();\n});\n<\/script>\n\n\n\n<p><a href=\"http:\/\/attacktube.com\/?p=1129\">\u3010JavaScript\u3011Array.prototype.reduce() (attacktube.com)<\/a><br><a href=\"https:\/\/kde.hateblo.jp\/entry\/2018\/10\/13\/065738#%E5%8E%9F%E5%89%87%E5%88%9D%E6%9C%9F%E5%80%A4%E3%81%AF%E3%81%A4%E3%81%91%E3%81%9F%E6%96%B9%E3%81%8C%E8%89%AF%E3%81%84\">\u3010JavaScript\u57fa\u790e\u3011Array.prototype.reduce() \u3092\u3057\u3063\u304b\u308a\u7406\u89e3\u3059\u308b\uff06\u30b5\u30f3\u30d7\u30eb\u96c6 &#8211; KDE BLOG (hateblo.jp)<\/a> ExternalLink<\/p>\n","protected":false},"excerpt":{"rendered":"<p>concat\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u81ea\u5206\u81ea\u8eab\u306e\u914d\u5217\u3068\u5f15\u6570\u3068\u3057\u3066\u6e21\u3055\u308c\u305f\u8981\u7d20\u3092\u9023\u7d50\u3057\u3066\u3001\u65b0\u3057\u3044\u30b3\u30d4\u30fc\u914d\u5217\u3092\u751f\u6210\u3059\u308b\u3002\u3082\u3057\u5f15\u6570\u3068\u3057\u3066\u6e21\u3055\u308c\u305f\u8981\u7d20\u304c\u914d\u5217\u306a\u3089\u3001\u305d\u3053\u306b\u542b\u307e\u308c\u308b\u8981\u7d20\u304c\u305d\u308c\u305e\u308c\u65b0\u3057\u304f\u4f5c\u3089\u308c\u305f\u914d\u5217\u306b\u8ffd\u52a0\u3055\u308c\u308b\u3002concat\u30e1\u30bd\u30c3\u30c9 [&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-1142","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\/1142","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=1142"}],"version-history":[{"count":11,"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/posts\/1142\/revisions"}],"predecessor-version":[{"id":1203,"href":"https:\/\/attacktube.com\/index.php?rest_route=\/wp\/v2\/posts\/1142\/revisions\/1203"}],"wp:attachment":[{"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1142"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1142"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/attacktube.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1142"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}