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shmem's scratchpad

by shmem (Canon)
on Mar 09, 2006 at 10:35 UTC ( #535366=scratchpad: print w/ replies, xml ) Need Help??

foo.pl

#!/usr/bin/perl use strict; my $pat = shift; my $p; { my (%s, %i); my $d = my $c = 1; # our regexp will be inside parens, so first back +ref is 2 $p = join ( "", map { if($s{$_}++){ "\\".$i{$_} } else{ $i{$_}=++$c; $c>$d+1 ? '(?!'.join('|',map{"\\".abs}-$c+1..-$d-1).")(\\w)" : + "(\\w)"; } } split//,$pat ); } print '(',$p,")\n"; open my $fh, '<', shift; my %s; while (<$fh>) { my @l = (); while (/\b($p)\b/g) { push @l, $1 unless $s{$1}++; } print join (", ",@l), $/ if @l; }

try: perl foo.pl fusselkerl /usr/share/dict/words

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