{"provider_name":"Hatena Blog","author_url":"https://blog.hatena.ne.jp/Naotsugu/","author_name":"Naotsugu","description":"\u914d\u5217 Ruby\u3067\u306f\u7d44\u307f\u8fbc\u307f\u306e Array \u30af\u30e9\u30b9\u304c\u914d\u5217\u3092\u8868\u3057\u307e\u3059\u3002\u914d\u5217\u3092\u4f5c\u6210\u3059\u308b\u306b\u306f\u30ea\u30c6\u30e9\u30eb\u3092\u4f7f\u7528\u3059\u308b\u304b\u3001\u660e\u793a\u7684\u306b Array \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\u3057\u307e\u3059\u3002 a = [ 3.14, \"pie\", 99] a.class # Array a.length # 3 a[2] # pie a[3] # nil(Ruby\u3067\u306fnil\u3082\u30aa\u30d6\u30b8\u30a7\u30af\u30c8) b = Array.new b[0] = 3.14 b[0] # 3.14 \u914d\u5217\u306f[]\u6f14\u7b97\u5b50\u306b\u3088\u3063\u3066\u53c2\u7167\u3057\u307e\u3059\u3002\u8ca0\u6570\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3067\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u3001\u914d\u5217\u306e\u7d42\u308f\u308a\u304b\u3089\u6570\u3048\u305f\u4f4d\u7f6e\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u53c2\u7167\u3067\u304d\u307e\u3059\u3002 \u914d\u5217\u306f[start, count]\u3068\u3044\u30462\u3064\u306e\u6570\u5024\u306e\u7d44\u2026","blog_title":"A Memorandum","title":"\u3060\u3044\u305f\u30443\u5206\u3050\u3089\u3044\u3067JRuby\u3000\u301c\u30b3\u30f3\u30c6\u30ca\u3068\u30d6\u30ed\u30c3\u30af\u301c","provider_url":"https://hatena.blog","url":"https://blog1.mammb.com/entry/20100102/1262692577","version":"1.0","width":"100%","type":"rich","blog_url":"https://blog1.mammb.com/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog1.mammb.com%2Fentry%2F20100102%2F1262692577\" title=\"\u3060\u3044\u305f\u30443\u5206\u3050\u3089\u3044\u3067JRuby\u3000\u301c\u30b3\u30f3\u30c6\u30ca\u3068\u30d6\u30ed\u30c3\u30af\u301c - A Memorandum\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","image_url":null,"height":"190","published":"2010-01-02 20:56:17","categories":["Ruby"]}