{"provider_url":"https://hatena.blog","width":"100%","blog_url":"https://rubyco.hatenadiary.org/","description":"freeze\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u3068\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u72b6\u614b\u304c\u5909\u66f4\u3055\u308c\u305f\u3068\u304d\u306b\u4f8b\u5916\u3092\u6295\u3052\u308b\u3088\u3046\u306b\u3067\u304d\u307e\u3059\u3002 s = \"123\" s.succ! p s #=> \"124\" s.freeze s.succ! #=> in `succ!': can't modify frozen string (TypeError) p s\u81ea\u5206\u3067\u4f5c\u3063\u305f\u30af\u30e9\u30b9\u306b\u5bfe\u3057\u3066\u3082\u3001\u7834\u58ca\u7684\u306a\u30e1\u30bd\u30c3\u30c9\u304b\u3069\u3046\u304b\u306f\u8a8d\u8b58\u3057\u3066\u304f\u308c\u308b\u3088\u3046\u3067\u3059\u306d\u3002 class Rubyco def initialize @var = 0 end def inc @var += 1 end end a = Rubyco.new b = Rubyco.new b.free\u2026","blog_title":"rubyco\uff08\u308b\u3073\u3053\uff09\u306e\u65e5\u8a18","provider_name":"Hatena Blog","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Frubyco.hatenadiary.org%2Fentry%2F20060301%2Ffreeze\" title=\"Object#freeze - 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>","title":"Object#freeze","url":"https://rubyco.hatenadiary.org/entry/20060301/freeze","type":"rich","author_name":"rubyco","published":"2006-03-01 00:00:07","author_url":"https://blog.hatena.ne.jp/rubyco/","version":"1.0","categories":[],"height":"190"}