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  <author_name>mzp</author_name>
  <author_url>https://blog.hatena.ne.jp/mzp/</author_url>
  <blog_title>みずぴー日記</blog_title>
  <blog_url>https://mzp.hatenadiary.org/</blog_url>
  <categories>
    <anon>30分プログラム</anon>
    <anon>Scheme</anon>
  </categories>
  <description>30分プログラム、その82。エロと風俗情報満載 どう抜く？よりアレイのuniq。 irb(main):001:0&gt; xs = [3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5, 8, 9, 7, 9] =&gt; [3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5, 8, 9, 7, 9] irb(main):002:0&gt; xs.uniq =&gt; [3, 1, 4, 5, 9, 2, 6, 8, 7] 例はRubyだけど、書くのはScheme。 (use srfi-1) (define (uniq1 xs) (if (null? xs) () (cons (car xs)…</description>
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  <image_url></image_url>
  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2007-07-13 00:00:00</published>
  <title>リストのuniq</title>
  <type>rich</type>
  <url>https://mzp.hatenadiary.org/entry/20070713/uniq</url>
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