There will always be a loop whether expressed or implied. Here's an SSCCE:

#!/usr/bin/env perl 
use strict;
use warnings;

print /(error.*)/ ? $1 : '' for <DATA>;

__DATA__
foo
error bar
baz

[download]

And the output is one line with error bar.

🦛

In reply to Re: Grepping the filehandler by hippo
in thread Grepping the filehandler by arunkumar.rk141

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