A hash will never have two identical keys.

#!/usr/bin/perl -w
use strict;
my %hash = (
  foo => 1,
  bar => 2,
  baz => 3,
  foo => 4,
);
print $hash{foo}, "\n"; # prints 4

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In reply to Re: equal keys in a hash by Mr. Muskrat
in thread equal keys in a hash by campbell

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