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I'm guessing it's to do with the fact that 'lama' has two a's? Is it possible to easily amend this code to handle this case?

Yes, and it's a trivial amendment. Just deploy the /g modifier:

#!/usr/bin/perl use strict; use warnings; my @words = <DATA>; chomp @words; while ( @words >= 2 ) { my $model = my $regex = shift @words; if ( $regex =~ s/(.*?)[ab](.*?)/$1\[ab\]$2/g ) { my @hits = grep /^$regex$/, @words; if ( @hits ) { print join( " ", $model, "matches", @hits, "using", $regex +, "\n" ); } } } __DATA__ lama lamb

In reply to Re^3: Comparing Lines within a Word List by hippo
in thread Comparing Lines within a Word List by dominick_t

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