{"url":"https://iken0.hatenadiary.org/entry/20070525/p2","blog_url":"https://iken0.hatenadiary.org/","image_url":null,"width":"100%","published":"2007-05-25 00:00:02","description":"a = [1,2,2,3,4,6,1,3,7,8,9] p a.index(3); #=> 3 p a.index(5); #=> nil # b\u3067\u59cb\u307e\u308b\u5358\u8a9e\u3092\u63a2\u3059 b = %w[red green blue white black] p b.find() {|x| x=~/\\Ab/} #=> \"blue\" 1.9\u4ee5\u964d\u3067\u306f p b.index {|x| x=~/\\Ab/} \u3053\u3046\u3044\u3046\u66f8\u304d\u65b9\u3067\uff0c\u4f4d\u7f6e\u3092\u53d6\u308c\u308b\u3089\u3057\u3044\uff0e\u3046\u3061\u306eruby\u306f1.8.x\u3060\uff0e","author_url":"https://blog.hatena.ne.jp/iken0/","title":"\u30c6\u30b9\u30c8\u3092\u901a\u308b\u6700\u521d\u306e\u8981\u7d20(\u306e\u4f4d\u7f6e)\u3092\u53d6\u5f97\u3059\u308b","blog_title":"\u30ed\u30d0\u306e\u8033","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fiken0.hatenadiary.org%2Fentry%2F20070525%2Fp2\" title=\"\u30c6\u30b9\u30c8\u3092\u901a\u308b\u6700\u521d\u306e\u8981\u7d20(\u306e\u4f4d\u7f6e)\u3092\u53d6\u5f97\u3059\u308b - \u30ed\u30d0\u306e\u8033\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":["ruby","array"],"height":"190","version":"1.0","author_name":"iken0","provider_name":"Hatena Blog","type":"rich","provider_url":"https://hatena.blog"}