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Re: Grep & Regex Question

by Kenosis (Priest)
on Dec 01, 2013 at 22:53 UTC ( #1065187=note: print w/ replies, xml ) Need Help??


in reply to Grep & Regex Question

Although ysth has a fix for the following issue, be careful using !/$position/ when grepping to remove unwanted elements, as unintended results may happen:

use strict; use warnings; my @priority = qw(RB1 RB2 FL1 FL11 FL2 QB1 QB2 TE1 WR1 WR2 DST); my $position = 'FL1'; print "$_\n" for grep !/$position/, @priority;

Output:

RB1 RB2 FL2 QB1 QB2 TE1 WR1 WR2 DST

Note that elements 'FL1' and 'FL11' were removed. To avoid this, use either ysth's $_ ne $position or !/^$position$/ (which forces a complete--not just partial--match) when grepping in your script.


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