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Re: How to grep exact string

by space_monk (Chaplain)
on Nov 15, 2012 at 13:44 UTC ( #1004014=note: print w/ replies, xml ) Need Help??


in reply to How to grep exact string

This is a rough draft for the hash idea explained earlier. It is not debugged or tested for compilation, so feel free to fix any minor issues....

use warnings; use strict; my @first_list; my @second_list; my %first_lc; my @second_lc; open FIRST_LIST, "< first_list.txt" or print $! "\n"; @first_list=<FIRST_LIST>; close (FIRST_LIST); chomp (@first_list); open SECOND_LIST, "< second_list.txt" or print $! "\n"; @second_list=<SECOND_LIST>; close (SECOND_LIST); chomp (@second_list); # create look up of machines in lower case my %first_lc = map { lc => 1 } @first_list; # not stricty necessary could use map in loop my @second_lc = map { lc } @second_list; print "Machines extra in second list\n\n"; foreach my $unique (@second_lc) { if (exists $first_lc{$unique}) { print "already there $unique\n\n"; } else { print "newly in this $unique\n\n"; } }
A Monk aims to give answers to those who have none, and to learn from those who know more.


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