a.pl is as below: 
use strict;

use warnings;



print "$_\n" while (<>);

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Update (multiple): apologies, didn't see the  $var part. I assume, you are going to use it as a list: 
my @var;
push(@var, $_) while(<>);

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In reply to Re: Need help with Piping by eosbuddy
in thread Need help with Piping by moroshko

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