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  <author_name>ikemonn</author_name>
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  <blog_title>ikemonn's blog</blog_title>
  <blog_url>https://ikemonn.hatenablog.com/</blog_url>
  <categories>
    <anon>JavaScript</anon>
  </categories>
  <description>jashkenas/underscoreの_.mapを読んだ。 概要 第一引数で与えられたものの値に対して、第二引数の関数を実行してその結果の配列を返す。 var list = [2, 3, 4]; var x = _.map(list, function(n){ return n *= 3; }); console.log(x); // [6, 9, 12] var list = {a: 2, b: 3, c: 4}; var x = _.map(list, function(n){ return n *= 3; }); console.log(x); // [6, 9, 12] ソースコー…</description>
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  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2015-10-15 08:00:00</published>
  <title>【Underscore.js】_.mapを読んだ</title>
  <type>rich</type>
  <url>https://ikemonn.hatenablog.com/entry/2015/10/15/080000</url>
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