{"published":"2013-01-05 22:41:50","description":"\u3057\u3064\u3053\u304f Hub \u3092\u8aad\u3080 Hash#new \u306b2\u5f15\u6570\u306e\u30d6\u30ed\u30c3\u30af\u3092\u6e21\u3059\u3068\uff0c\u5b58\u5728\u3057\u306a\u3044\u30ad\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u305d\u306e\u30d6\u30ed\u30c3\u30af\u304c\u547c\u3070\u308c\u308b\u3088\u3046\u306b\u3067\u304d\u308b\u3053\u3068\u306f\u524d\u304b\u3089\u77e5\u3063\u3066\u3044\u305f\u3051\u308c\u3069\uff0c\u305d\u308c\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u5229\u7528\u3067\u304d\u308b\u306e\u306f\u77e5\u3089\u306a\u304b\u3063\u305f\uff0e \u307e\u305a\uff0cHash#new \u306f\u3053\u3093\u306a\u611f\u3058\u3067\u4f7f\u3048\u308b\uff0e # \u5b58\u5728\u3057\u306a\u3044\u30ad\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u30ad\u30fc\u306e2\u500d\u306e\u5024\u304c\u8fd4\u3063\u3066\u304f\u308b\u30cf\u30c3\u30b7\u30e5\u3092\u4f5c\u6210 h = Hash.new do |_, key| key * 2 end p h[3] #=> 6 p h['poyo'] #=> \"poyopoyo\" # \u30ad\u30fc\u304c\u5b58\u5728\u3059\u308b\u5834\u5408\u306f\u305d\u306e\u5024\u3092\u8fd4\u3059\u306e\u3067\u30d6\u30ed\u30c3\u30af\u306f\u547c\u3070\u308c\u306a\u3044 h[3] = 10 p h[3] #=\u2026","type":"rich","title":" Hash \u3067\u304a\u624b\u8efd\u306b\u30e1\u30e2\u5316","provider_name":"Hatena Blog","version":"1.0","blog_url":"https://rhysd.hatenablog.com/","blog_title":"\u306f\u3084\u304f\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u306a\u308a\u305f\u3044","provider_url":"https://hatena.blog","author_name":"rhysd","width":"100%","author_url":"https://blog.hatena.ne.jp/rhysd/","image_url":null,"url":"https://rhysd.hatenablog.com/entry/2013/01/05/224150","categories":["Ruby"],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Frhysd.hatenablog.com%2Fentry%2F2013%2F01%2F05%2F224150\" title=\" Hash \u3067\u304a\u624b\u8efd\u306b\u30e1\u30e2\u5316 - \u306f\u3084\u304f\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u306a\u308a\u305f\u3044\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","height":"190"}