Wasn't familiar with Syntax::Keyword::Junction, so I appreciate seeing it used here. Also, File::Slurp's a good module to use...

Since the OP's comparing lists, List::Compare can help find unique entries in file2.txt:

use Modern::Perl;
use File::Slurp qw/read_file/;
use List::Compare;

my %hash;

my @file1 = map { chomp; lc } read_file 'file1.txt';
my @file2 = map { chomp; lc } read_file 'file2.txt';

my $lc = List::Compare->new( \@file1, \@file2 );

my @file2Only = $lc->get_Ronly;

say for @file2Only;

[download]

Output:

nt64osbld2
nt64osbld3
nt64oscitrix1
ntosbld4
ntosbld5
ntosbld6
vm-osw2k8x64-1
vm-osw2k8x64-2

[download]

Not in the OP's output formatting, but that wouldn't take much more...

In reply to Re^3: How to grep exact string by Kenosis
in thread How to grep exact string by Divakar

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