![\"\"](\"https:\/\/www.agent-grow.com\/self20percent\/wp-content\/uploads\/2018\/08\/0d40a5e4a645fc6b96e767d64ac0878e-3.png\")
<\/p>\n\u3053\u3093\u306b\u3061\u306f\uff01
\n\u6c5f\u5d5c\u3067\u3059\uff01<\/p>\n
\u4eca\u56de\u306f \u300c30 seconds of code\u300d \u3068\u3044\u3046\u30ec\u30dd\u30b8\u30c8\u30ea\u306b\u3064\u3044\u3066\u3054\u7d39\u4ecb\u3055\u305b\u3066\u3044\u305f\u3060\u304d\u307e\u3059\uff01<\/p>\n
<\/p>\n
URL \u306f https:\/\/github.com\/Chalarangelo\/30-seconds-of-code<\/a> \u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n README \u306e\u4e0a\u306e\u65b9\u306b<\/p>\n \n Curated collection of useful JavaScript snippets that you can understand in 30 seconds or less.\n<\/p><\/blockquote>\n \u3068\u306e\u8a18\u8f09\u304c\u3042\u308a\u307e\u3059\u3002 30 \u79d2\u3067\u7406\u89e3\u3067\u304d\u308b JavaScript \u306e\u30b3\u30fc\u30c9\u96c6\u306a\u3093\u3067\u3059\u306d\uff01<\/p>\n \u3061\u306a\u307f\u306b\u3001\u30db\u30fc\u30e0\u30da\u30fc\u30b8\u306e\u4f53\u88c1\u306b\u306a\u3063\u3066\u3044\u308b\u3082\u306e\u3082\u3042\u308a\u307e\u3059\u3002 \u4e0a\u90e8\u306e \u3059\u308b\u3068\u2026<\/p>\n \u30ba\u30e9\u30ba\u30e9\u30fc\u3063\u3068\u51fa\u3066\u304d\u307e\u3057\u305f\uff01<\/p>\n 2018\/9 \u6708\u6642\u70b9\u3067\u3001 321 \u3082\u306e\u30b3\u30fc\u30c9\u304c\u767b\u9332\u3055\u308c\u3066\u3044\u308b\u3088\u3046\u3067\u3059\uff01<\/p>\n \u5de6\u5074\u3092\u898b\u308b\u3068\u3001\u5927\u4f53\u306e\u5185\u5bb9\u3054\u3068\u306b\u30ab\u30c6\u30b4\u30ea\u5206\u3051\u3055\u308c\u3066\u3044\u307e\u3059\u306d\u3002<\/p>\n \u4e00\u756a\u4e0a\u304b\u3089\u898b\u3066\u3044\u304f\u306e\u3082\u826f\u3057\u3001\u8208\u5473\u304c\u3042\u308b\u30ab\u30c6\u30b4\u30ea\u3060\u3051\u898b\u308b\u306e\u3082\u3044\u3044\u3067\u3059\u306d\uff01<\/p>\n \u3069\u306e\u30b3\u30fc\u30c9\u3082\u6570\u884c\u3067\u5b8c\u7d50\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u69cb\u9020\u304c\u5206\u304b\u308a\u3084\u3059\u304f\u52c9\u5f37\u306b\u306a\u308a\u307e\u3059\u3088\uff01<\/p>\n \u6298\u89d2\u306a\u306e\u3067\u3001\u3044\u304f\u3064\u304b\u3054\u7d39\u4ecb\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n https:\/\/30secondsofcode.org\/array#everynth<\/a><\/p>\n \u914d\u5217\u7cfb\u306f\u30e9\u30e0\u30c0\u5f0f\u7684\u306a\u66f8\u304d\u65b9\u304c\u51fa\u6765\u308b\u90fd\u5408\u4e0a\u3001\u8272\u3005\u3068\u9762\u767d\u3044\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002 \u529b\u696d\u3067\u3084\u308d\u3046\u3068\u3059\u308b\u3068 https:\/\/30secondsofcode.org\/string#csvtoarray<\/a><\/p>\n CSV \u30d5\u30a1\u30a4\u30eb\u306e\u30c6\u30ad\u30b9\u30c8\u3092\u914d\u5217\u3078\u683c\u7d0d\u3059\u308b\u65b9\u6cd5\u3067\u3059\u306d\u3002 https:\/\/30secondsofcode.org\/math#average<\/a><\/p>\n \u5e73\u5747\u3092\u53d6\u308b\u306e\u3082\u3001\u4e00\u884c\u3067\u884c\u3051\u307e\u3059\u306d\u3002 https:\/\/30secondsofcode.org\/array#head<\/a><\/p>\n \u3053\u3093\u306a\u306e\u3082\u3042\u308a\u307e\u3059\u3002 \u3053\u3093\u306a\u611f\u3058\u3067\u3001 30 seconds of code \u306b\u306f\u9762\u767d\u3044\u30b3\u30fc\u30c9\u304c\u305f\u304f\u3055\u3093\u3042\u308a\u307e\u3059\u3002<\/p>\n \u7686\u3055\u3093\u3082\u3044\u308d\u3044\u308d\u898b\u3066\u3001\u9762\u767d\u3044\u30b3\u30fc\u30c9\u3092\u63a2\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u306d\u3002<\/p>\n \u3061\u306a\u307f\u306b\u3001github \u3067\u7ba1\u7406\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u3082\u3061\u308d\u3093\u7686\u3055\u3093\u306e\u30b3\u30fc\u30c9\u3092\u767b\u9332\u3059\u308b\u3088\u3046\u306b\u7533\u8acb\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3088\u3002<\/p>\n \u307e\u305f\u3001\u4eca\u56de\u7d39\u4ecb\u3057\u305f\u306e\u306f JavaScript \u7248\u3067\u3059\u304c\u3001\u305d\u306e\u4ed6\u306b\u3082<\/p>\n \u4ee5\u4e0a\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n \u9762\u63a5\u306f\u3001\u9762\u8ac7\u6642\u306b\u805e\u304b\u308c\u308b\u3088\u3046\u306a\u57fa\u790e\u554f\u984c\u96c6\u307f\u305f\u3044\u306a\u611f\u3058\u3067\u3059\u306d\u3002 \u305c\u3072\u3001\u7686\u3055\u3093\u3082\u8272\u3005\u8aad\u3093\u3067\u307f\u3066\u3001\u697d\u3057\u3093\u3067\u304f\u3060\u3055\u3044\u306d\uff01<\/p>\n","protected":false},"excerpt":{"rendered":" 30 seconds of code ! \u3053\u3093\u306b\u3061\u306f\uff01 \u6c5f\u5d5c\u3067\u3059\uff01 \u4eca\u56de\u306f \u300c30 seconds of code\u300d \u3068\u3044\u3046\u30ec\u30dd\u30b8\u30c8\u30ea\u306b\u3064\u3044\u3066\u3054\u7d39\u4ecb\u3055\u305b\u3066\u3044\u305f\u3060\u304d\u307e\u3059\uff01 URL \u306f https:\/\/github.com\/ […]<\/p>\n","protected":false},"author":15,"featured_media":9841,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[10],"tags":[45],"class_list":["post-9550","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tech","tag-javascript"],"jetpack_featured_media_url":"https:\/\/www.agent-grow.com\/self20percent\/wp-content\/uploads\/2018\/09\/6dee720f7498bb43c796216be1b36592.png","jetpack_shortlink":"https:\/\/wp.me\/p7Bq4F-2u2","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.agent-grow.com\/self20percent\/wp-json\/wp\/v2\/posts\/9550","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.agent-grow.com\/self20percent\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.agent-grow.com\/self20percent\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.agent-grow.com\/self20percent\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/www.agent-grow.com\/self20percent\/wp-json\/wp\/v2\/comments?post=9550"}],"version-history":[{"count":0,"href":"https:\/\/www.agent-grow.com\/self20percent\/wp-json\/wp\/v2\/posts\/9550\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.agent-grow.com\/self20percent\/wp-json\/wp\/v2\/media\/9841"}],"wp:attachment":[{"href":"https:\/\/www.agent-grow.com\/self20percent\/wp-json\/wp\/v2\/media?parent=9550"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.agent-grow.com\/self20percent\/wp-json\/wp\/v2\/categories?post=9550"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.agent-grow.com\/self20percent\/wp-json\/wp\/v2\/tags?post=9550"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nhttps:\/\/30secondsofcode.org\/<\/a>
\n\u3053\u3061\u3089\u306e\u65b9\u304c\u898b\u3084\u3059\u3044\u306e\u3067\u3001\u4eca\u56de\u306f\u3053\u3061\u3089\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n![\"\"](\"https:\/\/www.agent-grow.com\/self20percent\/wp-content\/uploads\/2018\/08\/0d40a5e4a645fc6b96e767d64ac0878e-2.png\")
<\/p>\n321 \u3082\u306e\u30b3\u30fc\u30c9\u3092\u898b\u3088\uff01<\/h1>\n
View collection<\/code> \u30dc\u30bf\u30f3\u304b\u3089\u30ea\u30b9\u30c8\u3092\u898b\u3066\u307f\u307e\u3059\u3002<\/p>\n![\"\"](\"https:\/\/www.agent-grow.com\/self20percent\/wp-content\/uploads\/2018\/08\/0d40a5e4a645fc6b96e767d64ac0878e-4.png\")
<\/p>\nArray: everyNth<\/h3>\n
\nconst everyNth = (arr, nth) => arr.filter((e, i) => i % nth === nth - 1);\n<\/pre>\n
\n\u4f8b\u3048\u3070\u3053\u3061\u3089\u306f N \u306e\u500d\u6570\u306e\u5024\u3092\u53d6\u308a\u51fa\u3059\u30b3\u30fc\u30c9\u3067\u3059\u306d\u3002<\/p>\nfor<\/code> \u3092\u56de\u3057\u3066\u3001\u5225\u914d\u5217\u306b\u8a72\u5f53\u306e\u5024\u3092\u5165\u308c\u3066\u884c\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u304c\u3001
\n\u3053\u308c\u306a\u3089\u30b7\u30f3\u30d7\u30eb\u3067\u30b3\u30fc\u30c9\u3082\u5206\u304b\u308a\u3084\u3059\u3044\u30ec\u30d9\u30eb\u3067\u4fee\u6b63\u3067\u304d\u307e\u3059\u306d\u3002<\/p>\nString: CSVToArray<\/h3>\n
\nconst CSVToArray = (data, delimiter = ',', omitFirstRow = false) =>\n data\n .slice(omitFirstRow ? data.indexOf('\\n') + 1 : 0)\n .split('\\n')\n .map(v => v.split(delimiter));\n<\/pre>\n
\n\u3053\u308c\u3082\u77e5\u3089\u306a\u3044\u3068\u7d50\u69cb\u9577\u3044\u30b3\u30fc\u30c9\u306b\u306a\u308a\u305d\u3046\u3067\u3059\u304c\u3001
\n\u5358\u7d14\u306b\u6539\u884c\u6587\u5b57\u3067\u5206\u5272\u3057\u305f\u914d\u5217\u3078\u5909\u66f4\u3001\u3055\u3089\u306b\u305d\u306e\u4e2d\u306e ,<\/code> \u3067\u5206\u5272\u3057\u3066\u914d\u5217\u306b\u3057\u3066\u3044\u308b\u3053\u3068\u3067
\n\u30ad\u30ec\u30a4\u306b CSV \u304b\u3089\u914d\u5217\u3092\u4f5c\u6210\u3067\u304d\u3066\u3044\u307e\u3059\u306d\u3002<\/p>\nMath: average<\/h3>\n
\nconst average = (...nums) => nums.reduce((acc, val) => acc + val, 0) \/ nums.length;\n<\/pre>\n
\n\u3061\u306a\u307f\u306b\u5f15\u6570\u306e\u6240\u304c\u53ef\u5909\u9577\u5f15\u6570\u306b\u306a\u3063\u3066\u3044\u308b\u305f\u3081\u3001\u4f55\u500b\u3067\u3082\u5f15\u6570\u3092\u6e21\u305b\u308b\u306e\u304c\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002<\/p>\nArray: head<\/h3>\n
\nconst head = arr => arr[0];\n<\/pre>\n
\n\u308f\u3056\u308f\u3056\u95a2\u6570\u306b\u3057\u306a\u304f\u3066\u3082\u2026\u3068\u3082\u601d\u3044\u307e\u3059\u304c\u3001\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u4f7f\u3044\u65b9\u3068\u3057\u3066\u898b\u305b\u308b\u306b\u306f\u9762\u767d\u3044\u304b\u306a\uff1f<\/p>\n\u9762\u767d\u3044\u30b3\u30fc\u30c9\u3092\u767a\u6398\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\uff01<\/h1>\n
\n
\n\u8aad\u3093\u3067\u52c9\u5f37\u3059\u308b\u3082\u3088\u3057\u3001\u51fa\u3059\u5074\u3068\u3057\u3066\u53c2\u8003\u306b\u3057\u3066\u307f\u308b\u306e\u3082\u9762\u767d\u3044\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n