http://www.perlmonks.org?node_id=870807


in reply to Store regular expressions in a file.

You could eval the code into existence. People decry it, but it is one thing that makes dynamic languages so powerful:

#!/usr/bin/perl

use strict;
use warnings;

my $data = "duck";
while(<DATA>) {
    chomp;
    my $code = eval "sub{ \$_[0] =~ $_ }" // die $@;
    if( $code->( $data ) ) {
        print "$data\n";
    }
}

__DATA__
s/duck/luck/

[download]

Produces:

c:\test>junk02
luck

[download]
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In Section Seekers of Perl Wisdom