{"author_name":"koseki2","provider_name":"Hatena Blog","type":"rich","title":" Ruby \u306e Array#index \u306f\u3001\u8981\u7d20\u3068\u30d6\u30ed\u30c3\u30af\u3092\u6e21\u3059\u306e\u3001\u3069\u3063\u3061\u304c\u901f\u3044\u306e\uff1f","blog_url":"https://koseki.hatenablog.com/","author_url":"https://blog.hatena.ne.jp/koseki2/","categories":[],"description":"Array#index \u3092\u4f7f\u3063\u3066\u3001\u914d\u5217\u306b\u542b\u307e\u308c\u308b\u8981\u7d20\u306e\u4f4d\u7f6e\u3092\u53d6\u5f97\u3057\u305f\u3044\u3002\u914d\u5217\u306e\u8981\u7d20\u304c\u914d\u5217\u3084\u30cf\u30c3\u30b7\u30e5\u3067\u3001\u4e00\u610f\u306b\u8b58\u5225\u53ef\u80fd\u306aID\u304c\u542b\u307e\u308c\u308b\u5834\u5408\u3001\u63a2\u3057\u65b9\u306f\u3001\u8981\u7d20\u3092\u76f4\u63a5\u6e21\u3059\u306e\u3068(==\u3067\u6bd4\u8f03\u3059\u308b)\u3001\u30d6\u30ed\u30c3\u30af\u3092\u6e21\u3059\u65b9\u6cd5\u304c\u3042\u308b\u3002 # \u30cf\u30c3\u30b7\u30e5\u3092\u305d\u306e\u307e\u307e\u6e21\u3059\u3002 array.index hash # \u30cf\u30c3\u30b7\u30e5\u306e\u5024\u3092\u30d6\u30ed\u30c3\u30af\u3067\u6bd4\u8f03\u3059\u308b\u3002 array.index { |hash2| hash[:id] == hash2[:id] } \u3069\u3063\u3061\u304c\u901f\u3044\u306e\u304b\u6c17\u306b\u306a\u3063\u305f\u306e\u3067\u3001\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u3092\u3068\u3063\u305f\u3002Ruby 1.9.3p283\u3002\u81ea\u5206\u306e\u4e88\u60f3\u306f\u300c\u914d\u5217\u306e\u8981\u7d20\u306b\u542b\u307e\u308c\u308b\u8981\u7d20\u6570\u304c\u3042\u308b\u7a0b\u5ea6\u591a\u304f\u306a\u308b\u3068\u3001\u30d6\u30ed\u30c3\u30af\u306e\u65b9\u304c\u901f\u304f\u306a\u308b\u300d\u3002\u5b9f\u969b\u306b\u306f\u3001\u8981\u7d20\u2026","width":"100%","version":"1.0","image_url":null,"provider_url":"https://hatena.blog","url":"https://koseki.hatenablog.com/entry/20121122/rubyArrayIndex","blog_title":"\u3053\u305b\u304d\u306e\u6280\u8853\u65e5\u8a18","published":"2012-11-22 00:00:00","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkoseki.hatenablog.com%2Fentry%2F20121122%2FrubyArrayIndex\" title=\" Ruby \u306e Array#index \u306f\u3001\u8981\u7d20\u3068\u30d6\u30ed\u30c3\u30af\u3092\u6e21\u3059\u306e\u3001\u3069\u3063\u3061\u304c\u901f\u3044\u306e\uff1f - \u3053\u305b\u304d\u306e\u6280\u8853\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>"}