Instead of 

@array = ('A','B','C','D');
for (@array) {
  $hash{$_} = undef;
}

[download]
you can use 
my @array = qw/A B C D/;
my %hash;
@hash{@array} = ();

[download]

In reply to Re^2: Compare all array values without a loop by Crian
in thread Compare all array values without a loop by Anonymous Monk

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