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Posted By

zingo on 07/01/08


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regex cli perl statistic


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Words with many doubled letters

Published in: Bash 

URL: http://www.leancrew.com/all-this/2008/07/words-with-many-doubled-letters/

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  1. # words with three consecutive doubled letters
  2. perl -ne 'print if /(.)\1(.)\2(.)\3/' /usr/share/dict/words
  3.  
  4. # words with three doubled letters, regardless of whether they’re consecutive.
  5. perl -ne 'print if /(.)\1.(.)\2.(.)\3/' /usr/share/dict/words
  6.  
  7. # words with four doubled letters
  8. perl -ne 'print if /(.)\1.*(.)\2.*(.)\3.*(.)\4/' /usr/share/dict/words

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