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  <blog_title>ボクノス</blog_title>
  <blog_url>https://boxnos.hatenablog.com/</blog_url>
  <categories>
    <anon>Scheme</anon>
  </categories>
  <description>2.3に入ります。記号データってのは、シンボルのこと? 問題 2.53 シンボルとmemqの問題。 (list 'a 'b 'c) ; (a b c) (list (list 'george)) ; ((george)) (cdr '((x1 x2) (y1 y2))) ; ((y1 y2)) (cadr '((x1 x2) (y1 y2))) ; (y1 y2) (pair? (car '(a short list))) ; #f (memq 'red '((red shoes) (blue socks))) ; #f (memq 'red '(red shoes blue socks)) …</description>
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  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2007-12-04 00:59:51</published>
  <title> SICPを読む(68) 問題 2.53 - 2.55 記号データ</title>
  <type>rich</type>
  <url>https://boxnos.hatenablog.com/entry/20071204/1196697591</url>
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