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From: Erik Naggum <erik@naggum.no>
Subject: Re: question on sort
Date: 2000/02/28
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* Philip Nikolayev <nikolay@is02.fas.harvard.edu>
| Is there a way to sort (with sort) a list of pairs of numbers by the
| value of the first element of each pair?

  yes.  (sort <sequence> <predicate> :key #'first) will use first to
  extract the value from each element of the sequence before comparing.

#:Erik