{"published":"2006-03-26 00:00:00","provider_url":"https://hatena.blog","description":"Object#dup\u306fshallow copy\u3067\u3059\u3051\u308c\u3069\u3001Marshal.dump\u3068Marshal.load\u3067deep copy\u306b\u306a\u308a\u307e\u3059\u3002 a = [\"A\", [\"B\", \"C\"]] # dup - shallow copy b = a.dup p a == b #=> true p a.object_id == b.object_id #=> false p a[0].object_id == b[0].object_id #=> true p a[1].object_id == b[1].object_id #=> true # dump+load - deep copy c = Mar\u2026","title":"Marshal\u3067deep copy","height":"190","blog_url":"https://rubyco.hatenadiary.org/","author_name":"rubyco","url":"https://rubyco.hatenadiary.org/entry/20060326/marshal","categories":[],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Frubyco.hatenadiary.org%2Fentry%2F20060326%2Fmarshal\" title=\"Marshal\u3067deep copy - 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>","provider_name":"Hatena Blog","type":"rich","version":"1.0","blog_title":"rubyco\uff08\u308b\u3073\u3053\uff09\u306e\u65e5\u8a18","width":"100%","image_url":null,"author_url":"https://blog.hatena.ne.jp/rubyco/"}