Apart from a few typos, the only problem I see is that you're putting an array ref into @output instead of the array elements (i.e., lose the square brackets).

Here's my version, and it seems to work fine: 

#!/usr/bin/perl -w
use strict;
use warnings;
use Data::Dumper;
#kaks üheveerulist faili, prindib need veerud mis ühes on aga teises p
+ole
#ehk siis suurem fail miinus väiksem
my $num_args = $#ARGV + 1;
if ($num_args != 3) {
  print "\nUsage: ./lahutaja suurem väiksem vahe(output)\n";
  exit;
}
my $f=$ARGV[0];
my $qa=$ARGV[1];
my $out=$ARGV[2];
open  FA, "< $f"or die "Can't open $f: $!";
open  QA, "< $qa" or die "Can't open $qa: $!";
open  OUT,"> $out" or die "Can't open $out: $!";



my @bl = <QA>;
my @a = <FA>;
my %h;

@h{@bl} = @bl;
my @output=grep {!exists $h{$_}} @a;

print "\@bl:    [ @bl ]\n";
print "\@a:     [ @a ]\n";
print "\@output:[ @output ]\n";
print OUT  @output;

close FA;
close QA;
close OUT;

[download]

Mike

In reply to Re: get difference of two arrays by RMGir
in thread get difference of two arrays by naturalsciences

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