{"version":"1.0","url":"https://takuya-1st.hatenablog.jp/entry/20120812/1344805165","author_url":"https://blog.hatena.ne.jp/takuya_1st/","categories":[],"width":"100%","description":"ruby \u3067\u5909\u6570\u304c\u521d\u671f\u5316\u3055\u308c\u3066\u306a\u3044\u6642\u306b\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u4ee3\u5165\u3057\u3088\u3046\u3068\u3057\u305f\u3002 a = ARGV[0] a ||= 100 \u3082\u3063\u3068\u30b9\u30de\u30fc\u30c8\u306b\u66f8\u3051\u306a\u3044\u304b\u306a\u3041\u3002 a = 100 || b\u3067\u3082\u3053\u308c\u3092\u9006\u306b\u66f8\u304f\u3068\u52d5\u304b\u306a\u3044\u3093\u3060\u3002 a = b || 100 NameError: undefined local variable or method `b' for main:Object\u3082\u3061\u308d\u3093\u3001\u5909\u6570\u304c\u304c\u521d\u671f\u5316\u6e08\u307f\u306a\u3089\u30a8\u30e9\u30fc\u306f\u51fa\u306a\u3044\u3002\u9006\u3082\u30a8\u30e9\u30fc\u306b\u306a\u3089\u306a\u3044\u3002 b = nil a = 100 || b #=> 100\u9006 b = nil a = b || 100 #=> 100 \u3068\u3044\u3046\u3053\u3068\u3067 || \u6f14\u7b97\u5b50\uff08\u306a\u3093\u3066\u8aad\u3080\u306e\uff1f\u2026","height":"190","type":"rich","author_name":"takuya_1st","provider_url":"https://hatena.blog","blog_url":"https://takuya-1st.hatenablog.jp/","published":"2012-08-12 05:59:25","image_url":null,"title":"Ruby\u3067\u5909\u6570\u306e\u521d\u671f\u5316","blog_title":"\u305d\u308c\u30de\u30b0\u3067\uff01","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftakuya-1st.hatenablog.jp%2Fentry%2F20120812%2F1344805165\" title=\"Ruby\u3067\u5909\u6570\u306e\u521d\u671f\u5316 - \u305d\u308c\u30de\u30b0\u3067\uff01\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>"}