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Perl Hash:Can not keep hash data in the same order that it was inserted

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# 1  
Old 03-23-2010
Perl Hash:Can not keep hash data in the same order that it was inserted

Can Someone explain me why even using Tie::IxHash I can not get the output data in the same order that it was inserted? See code below.

use warnings;
use Tie::IxHash;
use strict;

tie (my %programs, "Tie::IxHash");

while (my $line = <DATA>) {
    chomp $line;
    my( $company, $site, $program, $product, $price) = split('--', $line);
    push @{ $programs{$program}{$product} }, $price;

for my $program (keys %programs) {
    print "$program\n";
    print "list of products: ", join(", ", keys %{$programs{$program}}), "\n";
    print "list of prices: ",
          join(", ", map { @{$programs{$program}{$_}} } keys %{$programs{$program}}), "\n";


Last edited by Franklin52; 03-23-2010 at 12:12 PM.. Reason: Please use code tags!
# 2  
Old 03-23-2010
it works

It seems it does work.
or can you explain what you expect for the result exactly?

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