{"id":28271,"date":"2024-03-18T17:09:24","date_gmt":"2024-03-18T08:09:24","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/es6%e3%81%a7%e9%85%8d%e5%88%97%e3%82%92%e3%83%ab%e3%83%bc%e3%83%97%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/"},"modified":"2024-03-22T18:10:56","modified_gmt":"2024-03-22T09:10:56","slug":"es6%e3%81%a7%e9%85%8d%e5%88%97%e3%82%92%e3%83%ab%e3%83%bc%e3%83%97%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/es6%e3%81%a7%e9%85%8d%e5%88%97%e3%82%92%e3%83%ab%e3%83%bc%e3%83%97%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/","title":{"rendered":"es6\u3067\u914d\u5217\u3092\u30eb\u30fc\u30d7\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f"},"content":{"rendered":"<p>ES6\u3067\u306f\u3001\u914d\u5217\u3092\u7e70\u308a\u8fd4\u3057\u51e6\u7406\u3059\u308b\u305f\u3081\u306e\u69d8\u3005\u306a\u30e1\u30bd\u30c3\u30c9\u304c\u63d0\u4f9b\u3055\u308c\u3066\u304a\u308a\u3001\u4e00\u822c\u7684\u306a\u3082\u306e\u306b\u306f\u6b21\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ol>\n<li>for&#8230;of \u30eb\u30fc\u30d7\uff1a\u7c21\u6f54\u306a\u69cb\u6587\u3067\u914d\u5217\u306e\u5404\u8981\u7d20\u3092\u7e70\u308a\u8fd4\u3057\u51e6\u7406\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">let<\/span> arr = [<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>];\r\n<span class=\"hljs-keyword\">for<\/span>(<span class=\"hljs-keyword\">let<\/span> item <span class=\"hljs-keyword\">of<\/span> arr) {\r\n  <span class=\"hljs-variable language_\">console<\/span>.<span class=\"hljs-title function_\">log<\/span>(item);\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>forEach\u30e1\u30bd\u30c3\u30c9\uff1a\u914d\u5217\u306eforEach\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u6e21\u3057\u3066\u3001\u914d\u5217\u306e\u5404\u8981\u7d20\u3092\u53cd\u5fa9\u51e6\u7406\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">let<\/span> arr = [<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>];\r\narr.<span class=\"hljs-title function_\">forEach<\/span>(<span class=\"hljs-function\">(<span class=\"hljs-params\">item<\/span>) =&gt;<\/span> {\r\n  <span class=\"hljs-variable language_\">console<\/span>.<span class=\"hljs-title function_\">log<\/span>(item);\r\n});\r\n<\/code><\/pre>\n<ol>\n<li>map\u30e1\u30bd\u30c3\u30c9\uff1a\u914d\u5217\u306emap\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u6e21\u3057\u3066\u65b0\u3057\u3044\u914d\u5217\u3092\u751f\u6210\u3057\u307e\u3059\u3002\u65b0\u3057\u3044\u914d\u5217\u306e\u8981\u7d20\u306f\u3001\u5143\u306e\u914d\u5217\u304c\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3067\u51e6\u7406\u3055\u308c\u305f\u7d50\u679c\u3067\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">let<\/span> arr = [<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>];\r\n<span class=\"hljs-keyword\">let<\/span> newArr = arr.<span class=\"hljs-title function_\">map<\/span>(<span class=\"hljs-function\">(<span class=\"hljs-params\">item<\/span>) =&gt;<\/span> {\r\n  <span class=\"hljs-keyword\">return<\/span> item * <span class=\"hljs-number\">2<\/span>;\r\n});\r\n<span class=\"hljs-variable language_\">console<\/span>.<span class=\"hljs-title function_\">log<\/span>(newArr); <span class=\"hljs-comment\">\/\/ [2, 4, 6]<\/span>\r\n<\/code><\/pre>\n<ol>\n<li>filter\u30e1\u30bd\u30c3\u30c9\uff1a\u914d\u5217\u306efilter\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u6e21\u3057\u3066\u65b0\u3057\u3044\u914d\u5217\u3092\u751f\u6210\u3057\u307e\u3059\u3002\u65b0\u3057\u3044\u914d\u5217\u306e\u8981\u7d20\u306f\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u8981\u7d20\u3067\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">let<\/span> arr = [<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>];\r\n<span class=\"hljs-keyword\">let<\/span> newArr = arr.<span class=\"hljs-title function_\">filter<\/span>(<span class=\"hljs-function\">(<span class=\"hljs-params\">item<\/span>) =&gt;<\/span> {\r\n  <span class=\"hljs-keyword\">return<\/span> item &gt; <span class=\"hljs-number\">1<\/span>;\r\n});\r\n<span class=\"hljs-variable language_\">console<\/span>.<span class=\"hljs-title function_\">log<\/span>(newArr); <span class=\"hljs-comment\">\/\/ [2, 3]<\/span>\r\n<\/code><\/pre>\n<ol>\n<li>find\u30e1\u30bd\u30c3\u30c9\uff1a\u914d\u5217\u306efind\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u6e21\u3057\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u6700\u521d\u306e\u8981\u7d20\u3092\u8fd4\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">let<\/span> arr = [<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>];\r\n<span class=\"hljs-keyword\">let<\/span> result = arr.<span class=\"hljs-title function_\">find<\/span>(<span class=\"hljs-function\">(<span class=\"hljs-params\">item<\/span>) =&gt;<\/span> {\r\n  <span class=\"hljs-keyword\">return<\/span> item &gt; <span class=\"hljs-number\">2<\/span>;\r\n});\r\n<span class=\"hljs-variable language_\">console<\/span>.<span class=\"hljs-title function_\">log<\/span>(result); <span class=\"hljs-comment\">\/\/ 3<\/span>\r\n<\/code><\/pre>\n<ol>\n<li>\u3059\u3079\u3066\u306e\u65b9\u6cd5\uff1a\u914d\u5217\u306eevery\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u6e21\u3057\u3066\u914d\u5217\u306e\u3059\u3079\u3066\u306e\u8981\u7d20\u304c\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\u3057\u3001\u30d6\u30fc\u30eb\u5024\u3092\u8fd4\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">let<\/span> arr = [<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>];\r\n<span class=\"hljs-keyword\">let<\/span> result = arr.<span class=\"hljs-title function_\">every<\/span>(<span class=\"hljs-function\">(<span class=\"hljs-params\">item<\/span>) =&gt;<\/span> {\r\n  <span class=\"hljs-keyword\">return<\/span> item &gt; <span class=\"hljs-number\">0<\/span>;\r\n});\r\n<span class=\"hljs-variable language_\">console<\/span>.<span class=\"hljs-title function_\">log<\/span>(result); <span class=\"hljs-comment\">\/\/ true<\/span>\r\n<\/code><\/pre>\n<ol>\n<li>\u3044\u304f\u3064\u304b\u306e\u65b9\u6cd5\uff1a\u914d\u5217\u306esome\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u6e21\u3057\u3066\u3001\u914d\u5217\u306e\u5c11\u306a\u304f\u3068\u30821\u3064\u306e\u8981\u7d20\u304c\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\u3057\u3001\u30d6\u30fc\u30eb\u5024\u3092\u8fd4\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">let<\/span> arr = [<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">3<\/span>];\r\n<span class=\"hljs-keyword\">let<\/span> result = arr.<span class=\"hljs-title function_\">some<\/span>(<span class=\"hljs-function\">(<span class=\"hljs-params\">item<\/span>) =&gt;<\/span> {\r\n  <span class=\"hljs-keyword\">return<\/span> item &gt; <span class=\"hljs-number\">3<\/span>;\r\n});\r\n<span class=\"hljs-variable language_\">console<\/span>.<span class=\"hljs-title function_\">log<\/span>(result); <span class=\"hljs-comment\">\/\/ false<\/span>\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u65b9\u6cd5\u4ee5\u5916\u306b\u3082\u3001reduce\u3084reduceRight\u306a\u3069\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u914d\u5217\u306e\u53cd\u5fa9\u51e6\u7406\u3084\u8a08\u7b97\u304c\u884c\u3048\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>ES6\u3067\u306f\u3001\u914d\u5217\u3092\u7e70\u308a\u8fd4\u3057\u51e6\u7406\u3059\u308b\u305f\u3081\u306e\u69d8\u3005\u306a\u30e1\u30bd\u30c3\u30c9\u304c\u63d0\u4f9b\u3055\u308c\u3066\u304a\u308a\u3001\u4e00\u822c\u7684\u306a\u3082\u306e\u306b\u306f\u6b21\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002 for&#8230;of \u30eb\u30fc\u30d7\uff1a\u7c21\u6f54\u306a\u69cb\u6587\u3067\u914d\u5217\u306e\u5404\u8981\u7d20\u3092\u7e70\u308a\u8fd4\u3057\u51e6\u7406\u3057\u307e\u3059\u3002 let arr = [ [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-28271","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>es6\u3067\u914d\u5217\u3092\u30eb\u30fc\u30d7\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/es6\u3067\u914d\u5217\u3092\u30eb\u30fc\u30d7\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"es6\u3067\u914d\u5217\u3092\u30eb\u30fc\u30d7\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f\" \/>\n<meta property=\"og:description\" content=\"ES6\u3067\u306f\u3001\u914d\u5217\u3092\u7e70\u308a\u8fd4\u3057\u51e6\u7406\u3059\u308b\u305f\u3081\u306e\u69d8\u3005\u306a\u30e1\u30bd\u30c3\u30c9\u304c\u63d0\u4f9b\u3055\u308c\u3066\u304a\u308a\u3001\u4e00\u822c\u7684\u306a\u3082\u306e\u306b\u306f\u6b21\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002 for&#8230;of \u30eb\u30fc\u30d7\uff1a\u7c21\u6f54\u306a\u69cb\u6587\u3067\u914d\u5217\u306e\u5404\u8981\u7d20\u3092\u7e70\u308a\u8fd4\u3057\u51e6\u7406\u3057\u307e\u3059\u3002 let arr = [ [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/es6\u3067\u914d\u5217\u3092\u30eb\u30fc\u30d7\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f\/\" \/>\n<meta property=\"og:site_name\" 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