No need to use a hash if you're just reading numbers from a file. Use an array instead:

#!/usr/bin/perl

use strict;
use warnings;

my $file = 'AXP_FACS.DAT';
open my $FH, '<', $file or die "Error opening file: $!";
my @faclist = (<$FH>); % Read all lines into the array
close $FH;
chomp @faclist;        % Remove newlines from each entry.

my @numbers = 1..5000;
foreach my $integer ( @numbers ) {
    unless ( grep { /\b$integer\b/ } @faclist ) {
        print "Not found: $integer\n";
    }
}

[download]

The '\b' at the start and end of the grep regular expression matches the entire number, not just a single digit.

njcodewarrior

In reply to Re: Hash checking by njcodewarrior
in thread Hash checking by Anonymous Monk

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