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  <author_name>troter</author_name>
  <author_url>https://blog.hatena.ne.jp/troter/</author_url>
  <blog_title>放牧日記</blog_title>
  <blog_url>https://troter.hatenablog.jp/</blog_url>
  <categories>
    <anon>prolog</anon>
  </categories>
  <description>バックトラックを禁止する述語らしい。これを使えば リスト - 放牧日記のtakeやdropも my_take(0, _, []) :- !. my_take(N, [Lcar | Lcdr], [Lcar | R]) :- N &gt; 0, N1 is N - 1, my_take(N1, Lcdr, R). my_drop(0, L, L) :- !. my_drop(N, [_ | Lcdr], R) :- N &gt; 0, N1 is N - 1, my_take(N1, Lcdr, R). my_split_at(0, L, [], L) :- !. my_split_at(N, [Lcar …</description>
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  <image_url></image_url>
  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2008-04-14 22:20:02</published>
  <title> カット</title>
  <type>rich</type>
  <url>https://troter.hatenablog.jp/entry/20080414/1208179202</url>
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