I was surprised to see that a hash tied with Tie::IxHash loses the ordering when processed in a sub: 
use strict; use warnings;

use Tie::IxHash;

tie my %h, 'Tie::IxHash', (a => 1, b => 2, c => 3);


warn $_ for keys %h; # prints in assigned order

sub printh {
    my %x=@_;
    warn $_ for keys %x; # prints in scattered order!
}

printh(%h);

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Is there anyway to preserve ordering when passing it? I suppose the OO way of making a tied hash would do, but I prefer normal Perl hashes over the OO interface.

In reply to having a hash maintain order when passed to a sub by metaperl

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