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  <author_name>faith_and_brave</author_name>
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  <blog_title>Faith and Brave - C++で遊ぼう</blog_title>
  <blog_url>https://faithandbrave.hateblo.jp/</blog_url>
  <categories>
    <anon>Haskell</anon>
  </categories>
  <description>ポイントフリースタイルで書いた場合 main = print $ wc &quot;Hello World Akira&quot; wc = length . words Arrowを使った場合 import Control.Arrow main = print $ wc &quot;Hello World Akira&quot; wc = arr (words &gt;&gt;&gt; length) &quot;Akira&quot;が渡されたら左側(++ &quot; : C++&quot;)、それ以外は右側(++ &quot; : Java&quot;)が処理される import Control.Arrow main = print $ language &quot;Akira&quot; jadge &quot;Akira&quot; =…</description>
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  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2008-12-19 19:28:53</published>
  <title> Arrow勉強中</title>
  <type>rich</type>
  <url>https://faithandbrave.hateblo.jp/entry/20081219/1229682533</url>
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