{"id":1918,"date":"2013-02-05T08:48:16","date_gmt":"2013-02-04T23:48:16","guid":{"rendered":"http:\/\/www.techscore.com\/blog\/?p=1918"},"modified":"2018-11-14T16:33:56","modified_gmt":"2018-11-14T07:33:56","slug":"rubyrails-enumerable-%e3%81%ae%e4%be%bf%e5%88%a9%e3%81%aa%e8%bf%b0%e8%aa%9e%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89","status":"publish","type":"post","link":"https:\/\/www.techscore.com\/blog\/2013\/02\/05\/rubyrails-enumerable-%e3%81%ae%e4%be%bf%e5%88%a9%e3%81%aa%e8%bf%b0%e8%aa%9e%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89\/","title":{"rendered":"Ruby\/Rails: Enumerable \u306e\u4fbf\u5229\u306a\u8ff0\u8a9e\u30e1\u30bd\u30c3\u30c9"},"content":{"rendered":"<p>\u3053\u3093\u306b\u3061\u306f\u3001\u9234\u6728\u3067\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>Ruby \u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30af\u30e9\u30b9\u306f Enumerable \u30e2\u30b8\u30e5\u30fc\u30eb\u3092 include \u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u305d\u3057\u3066\u3001Enumerabule \u30e2\u30b8\u30e5\u30fc\u30eb\u306b\u306f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u6271\u3046\u4e0a\u3067\u975e\u5e38\u306b\u4fbf\u5229\u306a\u30e1\u30bd\u30c3\u30c9\u304c\u6570\u591a\u304f\u63d0\u4f9b\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4eca\u56de\u306f\u305d\u306e\u4e2d\u304b\u3089\u3001\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u4e2d\u306b\u300c\u7279\u5b9a\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u8981\u7d20\u304c\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u300d\u3092\u5224\u5b9a\u3059\u308b\u8ff0\u8a9e\u30e1\u30bd\u30c3\u30c9\u3092\u307e\u3068\u3081\u307e\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>\u4fbf\u5229\u306a\u8ff0\u8a9e\u30e1\u30bd\u30c3\u30c9<\/h2>\n<p>Enumerable#any? \u3092\u7b46\u982d\u306b\u3001\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u5bfe\u3057\u3066\u300c\u6761\u4ef6\u3092\u6e80\u305f\u3059\u8981\u7d20\u306f\u3042\u308b\u306e\u304b\uff1f\u300d\u3001\u300c\u3044\u304f\u3064\u3042\u308b\u306e\u304b\uff1f\u300d\u3092\u5224\u5b9a\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u306b\u306f\u4ee5\u4e0b\u306e\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<table>\n<tbody>\n<tr>\n<th>\u30e1\u30bd\u30c3\u30c9<\/th>\n<th>\u8aac\u660e<\/th>\n<\/tr>\n<tr>\n<td>all?<\/td>\n<td>\u5168\u3066\u306e\u8981\u7d20\u304c\u6761\u4ef6\u3092\u6e80\u305f\u3059\u5834\u5408\u306b true\u3002\u8981\u7d20\u304c 0 \u306e\u5834\u5408\u3082 true\u3002<\/td>\n<\/tr>\n<tr>\n<td>none?<\/td>\n<td>\u6761\u4ef6\u3092\u6e80\u305f\u3059\u8981\u7d20\u304c 1 \u3064\u3082\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306b true\u3002\u8981\u7d20\u304c 0 \u306e\u5834\u5408\u3082 true\u3002<\/td>\n<\/tr>\n<tr>\n<td>any?<\/td>\n<td>\u6761\u4ef6\u3092\u6e80\u305f\u3059\u8981\u7d20\u304c 1 \u3064\u4ee5\u4e0a\u5b58\u5728\u3059\u308b\u5834\u5408\u306b true\u3002\u8981\u7d20\u304c 0 \u306e\u5834\u5408\u306f false\u3002<\/td>\n<\/tr>\n<tr>\n<td>one?<\/td>\n<td>\u6761\u4ef6\u3092\u6e80\u305f\u3059\u8981\u7d20\u304c 1 \u3064\u3060\u3051\u3042\u308b\u5834\u5408\u306b true\u3002<\/td>\n<\/tr>\n<tr>\n<td>many?<\/td>\n<td>\u6761\u4ef6\u3092\u6e80\u305f\u3059\u8981\u7d20\u304c 2 \u3064\u4ee5\u4e0a\u3042\u308b\u5834\u5408\u306b true\u3002\u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306f ActiveSupport \u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>many? \u3060\u3051\u306f ActiveSupport \u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>\u4f7f\u7528\u4f8b<\/h2>\n<p>\u4e0a\u8a18\u30e1\u30bd\u30c3\u30c9\u306f\u30d6\u30ed\u30c3\u30af\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408\u306f\u30d6\u30ed\u30c3\u30af\u306e\u623b\u308a\u5024\u3001\u305d\u3046\u3067\u306a\u3044\u5834\u5408\u306f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u8981\u7d20\u306e\u771f\u507d\u306b\u3088\u3063\u3066\u5224\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<p>all? \u3092\u4f8b\u306b\u4f7f\u3044\u65b9\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u307e\u305a\u306f\u30d6\u30ed\u30c3\u30af\u3092\u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\u3067\u3059\u3002<\/p>\n<pre class=\"lang:ruby decode:true\"># \u5168\u3066\u306e\u8981\u7d20\u304c\u771f\u3067\u3042\u308b\u304b\u5224\u5b9a\u3059\u308b.\r\n['1234567', 'abcdefg'].all? # =&gt; true\r\n\r\n# \u5168\u3066\u306e\u8981\u7d20\u304c\u771f\u3067\u3042\u308b\u304b\u5224\u5b9a\u3059\u308b.\r\n['1234567', 'abcdefg', nil].all? # =&gt; false<\/pre>\n<p>\u6b21\u306b\u30d6\u30ed\u30c3\u30af\u3092\u6307\u5b9a\u3059\u308b\u5834\u5408\u3067\u3059\u3002<\/p>\n<pre class=\"lang:ruby decode:true\"># 5 \u6559\u79d1\u306e\u30c6\u30b9\u30c8\u7d50\u679c\u304c\u5168\u3066 30 \u70b9\u4ee5\u4e0a\u3067\u3042\u308b\u304b\u5224\u5b9a\u3059\u308b.\r\npoints = {'\u56fd\u8a9e' =&gt; 70, '\u6570\u5b66' =&gt; 90, '\u7406\u79d1' =&gt; 85, '\u793e\u4f1a' =&gt; 29, '\u82f1\u8a9e' =&gt; 65}\r\npoints.all?{|name, point| point &gt;= 30} # =&gt; false\r\n\r\n# \u5168\u3066\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u304c 6 \u6587\u5b57\u4ee5\u4e0a\u3067\u3042\u308b\u304b\u5224\u5b9a\u3059\u308b.\r\npasswords = ['1234567', 'pass']\r\npasswords.all?{|s| s.length &gt;= 6} # =&gt; false<\/pre>\n<p>\u4ed6\u306e\u30e1\u30bd\u30c3\u30c9\uff08none?, any?, one?, many?\uff09\u306e\u4f7f\u3044\u65b9\u3082\u540c\u69d8\u3067\u3059\u3002<\/p>\n<pre class=\"lang:ruby decode:true\"># \u8981\u7d20\u6570 0 \u306e\u5834\u5408.\r\n[].one?  # =&gt; false\r\n[].many? # =&gt; false\r\n\r\n# \u8981\u7d20\u6570\u304c 1 \u306e\u5834\u5408.\r\n[:a].one?  # =&gt; true\r\n[:a].many? # =&gt; false\r\n\r\n# \u8981\u7d20\u6570\u304c 2 \u306e\u5834\u5408.\r\n[:a, :b].one?  # =&gt; false\r\n[:a, :b].many? # =&gt; true<\/pre>\n<p>&nbsp;<\/p>\n<h2>\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u304c\u7a7a\u306e\u5834\u5408<\/h2>\n<p>\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u304c\u7a7a\u306e\u5834\u5408\u306e\u7d50\u679c\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"lang:ruby decode:true\">[].all?  # =&gt; true\r\n[].none? # =&gt; true\r\n[].any?  # =&gt; false\r\n[].one?  # =&gt; false\r\n[].many? # =&gt; false<\/pre>\n<p>\u6163\u308c\u306a\u3044\u3046\u3061\u306f\u300c\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u304c\u7a7a\u306e\u5834\u5408\u306e\u623b\u308a\u5024\u306f\u306a\u3093\u3060\u3063\u3051\uff1f\u300d\u3068\u306a\u308b\u3053\u3068\u304c\u3042\u308b\u306e\u3067\u3001\u304d\u3061\u3093\u3068\u628a\u63e1\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u4eca\u56de\u306f\u300c\u8ff0\u8a9e\u30e1\u30bd\u30c3\u30c9\u300d\u3068\u3044\u3046\u5207\u308a\u53e3\u3067\u898b\u3066\u304d\u307e\u3057\u305f\u304c\u3001Enumerable \u306b\u306f\u4fbf\u5229\u306a\u30e1\u30bd\u30c3\u30c9\u304c\u591a\u6570\u5b58\u5728\u3057\u307e\u3059\u3002<\/p>\n<p>\u5225\u306e\u6a5f\u4f1a\u306b\u305d\u308c\u3089\u306e\u30e1\u30bd\u30c3\u30c9\u3082\u3054\u7d39\u4ecb\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u3093\u306b\u3061\u306f\u3001\u9234\u6728\u3067\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>Ruby \u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30af\u30e9\u30b9\u306f Enumerable \u30e2\u30b8\u30e5\u30fc\u30eb\u3092 include \u3057\u3066\u3044\u307e\u3059\u3002<br \/><a href=\"https:\/\/www.techscore.com\/blog\/2013\/02\/05\/rubyrails-enumerable-%e3%81%ae%e4%be%bf%e5%88%a9%e3%81%aa%e8%bf%b0%e8%aa%9e%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89\/\">\u7d9a\u304d\u3092\u8aad\u3080...<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[18],"tags":[68,22,24],"_links":{"self":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/1918"}],"collection":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/comments?post=1918"}],"version-history":[{"count":1,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/1918\/revisions"}],"predecessor-version":[{"id":17962,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/posts\/1918\/revisions\/17962"}],"wp:attachment":[{"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/media?parent=1918"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/categories?post=1918"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techscore.com\/blog\/wp-json\/wp\/v2\/tags?post=1918"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}