Scenario: A variable is mentioned in multiple file names and im able to grep once only.

Why should that be the case? That sounds like a rather odd restriction. If you absolutely must work with that restriction, you can do something like 

use autodie;
use List::MoreUtils qw/uniq/;
open my $F1, $filename1;
open my $F2, $filename2;
my @files = unique
            map $_->[0],
            grep $_->[1] =~ /$variable/,
              (map [$filename1, $_] <$F1>),
              (map [$filename2, $_] <$F2>),
            ;

[download]

Of course that code is much slower and uses much more memory than if you'd just search file by file.

Perl 6 - the future is here, just unevenly distributed

In reply to Re: Multiple file handling by moritz
in thread Multiple file handling by stallion

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