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  1. or download this
    #!/usr/bin/perl

...
$hash2{key1}->{subkey1} = [ qw(other elements in an array) ];
print Dumper(\%hash);
print Dumper(\%hash2);
  2. or download this
      Elt "key2" HASH = 0x3e4d4a
    SV = PV(0x80f6498) at 0x81009c4