{"type":"rich","title":"\u30ed\u30fc\u30ab\u30eb\u5909\u6570","author_url":"https://blog.hatena.ne.jp/rubyco/","version":"1.0","blog_url":"https://rubyco.hatenadiary.org/","provider_url":"https://hatena.blog","published":"2006-03-04 00:00:07","width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Frubyco.hatenadiary.org%2Fentry%2F20060304%2Fscope\" title=\"\u30ed\u30fc\u30ab\u30eb\u5909\u6570 - rubyco\uff08\u308b\u3073\u3053\uff09\u306e\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>","categories":[],"url":"https://rubyco.hatenadiary.org/entry/20060304/scope","author_name":"rubyco","blog_title":"rubyco\uff08\u308b\u3073\u3053\uff09\u306e\u65e5\u8a18","description":"\u30ed\u30fc\u30ab\u30eb\u5909\u6570lvar\u304c\u898b\u3048\u308b\u3088\u3046\u306b\u306a\u308b\u306e\u306f\u3001\u69cb\u6587\u89e3\u6790\u6642\u306b\u306f\u3058\u3081\u3066\u306e\u4ee3\u5165\u304c\u898b\u3064\u304b\u3063\u305f\u7b87\u6240\u3088\u308a\u3082\u5f8c\u3067\u3059\u304c\u3001lvar\u304c\u672a\u5b9a\u7fa9\u3067\u3042\u308b\u3068\u3044\u3046\u30a8\u30e9\u30fc\u304c\u51fa\u308b\u306e\u306f\u5b9f\u884c\u6642\u3067\u3059\u3002 \u69cb\u6587\u89e3\u6790\u6642\u306b\u4ee3\u5165\u304c\u898b\u3064\u304b\u3089\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u306e\u3067\u3001eval\u3067\u9593\u63a5\u7684\u306b\u5b9f\u884c\u3057\u3066\u3082\u99c4\u76ee\u3067\u3059\u3002\u30d1\u30fc\u30b6\u306feval\u306b\u4e0e\u3048\u308b\u6587\u5b57\u5217\u306e\u4e2d\u307e\u3067\u306f(\u6700\u521d\u306f)\u30d1\u30fc\u30ba\u3057\u306a\u3044\u304b\u3089\u3067\u3059\u3002 (1..2).each do |k| eval \"lvar = 1\" if k == 2 puts lvar #=> undefined local variable or method `lvar' for main:Object (NameError) else lvar +\u2026","image_url":null,"height":"190","provider_name":"Hatena Blog"}