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Re: Regular Expression Builder

by tommyw (Hermit)
on Aug 30, 2002 at 15:36 UTC ( #194145=note: print w/replies, xml ) Need Help??

in reply to Regular Expression Builder

Programming Perl includes:

#!/usr/bin/perl $vowels='aeiouy'; $cons='bcdfghjklmnpqrstvwxzy'; %map={C=>$cons, V=>$vowels; for $class=($vowels, $cons) { for (split //, $class) { map{$_}.=$class; } } for $char (split //, shift) { $pat.="[$map{$char}]"; } $re=qr/^${pat}$/i; print "REGEX is $re\n"; @ARGV='/usr/dict/words' if -t && !@ARGV; while (<>) { print if /$re/; }
Which takes a word, and builds a template from it with the same pattern of vowels and consonants. Although the original is commented. Extending this to handle digits should be easy. The cunning part will be collapsing the multiple character classes down, and using a multiple instead.

This is, of course, left as an exercise for the reader ;-)

Too stupid to live.
Too stubborn to die.

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[Eily]: Maybe the puns in his dialogues were somehow kept through translation, but I can tell he lost his accent
[LanX]: qui?
[Eily]: Astérix
1nickt gives up on finding a Perl YAML parser that supports hash merging. In 2017.
[LanX]: Oh yes true, he lost his accent! xD
[Eily]: and since his name is a modified version of astérisque (asterisk), which is a typographical symbol, I think it's even funnier that he would lose a diacritic
[Eily]: the pun doesn't work so well with "he lost a diacritic" though :P

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