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  <author_name>javascripter</author_name>
  <author_url>https://blog.hatena.ne.jp/javascripter/</author_url>
  <blog_title>素人がプログラミングを勉強していたブログ</blog_title>
  <blog_url>https://javascripter.hatenablog.com/</blog_url>
  <categories>
    <anon>ruby</anon>
  </categories>
  <description>+で継承、|でマージ。JavaScriptのprototypeチェインをハッシュで実装したもの。 require 'forwardable' class Prototype include Enumerable extend Forwardable def initialize(obj = {}) @scope = obj.dup @scope[&quot;__proto__&quot;] = nil end def []=(name, val) @scope[name] = val end def [](name) cur = @scope begin if cur.key?(name) cur = cur[n…</description>
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  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2008-11-21 06:22:55</published>
  <title>prototype</title>
  <type>rich</type>
  <url>https://javascripter.hatenablog.com/entry/20081121/1227216175</url>
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