Something like this should do the trick... 
use warnings;
use strict;
use Data::Dumper;

my @none;
my %hash = map {
    chomp;
    local @_ = split;
    if (/\sNONE$/) { push(@none, $_[0]); (); } else { ($_[0] => $_[1])
+ };
} grep /^ID\d+/, <DATA>;

warn Dumper \%hash, \@none;

__DATA__
Script version 1.7

12345 hashes read from
1 database

3 read, 2 found, 2 written
ID123 ZZ00000077
ID456 ZZ00000012
ID124 NONE

[download]
returns... 
:!perl test.pl
$VAR1 = {
          'ID456' => 'ZZ00000012',
          'ID123' => 'ZZ00000077'
        };
$VAR2 = [
          'ID124'
        ];

[download]
assuming the lines of interest always comprise just 2 whitespace separated fields.

BTW, as rovf points out, if you want STDOUT populating, you'll have to print each line as it's read from the command ...

A user level that continues to overstate my experience :-))

In reply to Re: Regular Expression and backquoted cmds by Bloodnok
in thread Regular Expression and backquoted cmds by joec_

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