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Are you sure you want to use a regex to do this? I think it's much more natural to use unpack (or even split, possibly) to do what you're trying to do.

Update: I suppose I should mention that the *reason* it would be more natural to use unpack is because your columns are fixed-width columns. Unpack is great for extracting columnar data formatted in this way...

Try this to see if it works for you:

#!/usr/bin/perl use strict; use warnings; use Data::Dumper; my %hash = ( 'CA12DE' => 1 ); my $line = 'Box of Joe CA12DE 12345'; my @data = unpack 'A15A10A9', $line; print Dumper(\@data); my $searchkey = $data[1]; if (exists($hash{$searchkey})) { print qq(searchkey "$searchkey" exists in the hash...\n); }
__OUTPUT__ $VAR1 = [ 'Box of Joe', 'CA12DE', '12345' ]; searchkey "CA12DE" exists in the hash...

What can be asserted without proof can be dismissed without proof. - Christopher Hitchens

In reply to Re: comparing columns using regular expression by thezip
in thread comparing columns using regular expression by rocky13

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