Well, first of all, redefining the hash *would* get rid of Apple => red, but that's probably not what you meant. :)

In a thread a while back, vroom wrote a nice solution using tie: Re: case sensitivity in hashes.

You'll have to modify it a bit, because you want multi- dimensional hashes; so I think you'd probably just have to tie all of the hashes of hashes of hashes, etc. So, for example, say you're using vroom's Tie::CaseInsensitive: 

use strict;

my %HASH;

use Tie::CaseInsensitive;
tie %HASH, 'Tie::CaseInsensitive';

$HASH{BoB}  = 1; 
$HASH{bob}  = 2;
$HASH{BOb}  = 3;

tie %{$HASH{bill}}, 'Tie::CaseInsensitive';
$HASH{bill}{jones} = 3;
$HASH{BILL}{JONES} = 2;

use Data::Dumper;
print Dumper \%HASH;

[download]
You should get: 
$VAR1 = {
          'bill' => {
                      'jones' => 2
                    },
          'bob' => 3
        };

[download]
which looks quite right.

In reply to Re: Case insensitivity in a hash... Futile effort? by btrott
in thread Case insensitivity in a hash... Futile effort? by ChuckularOne

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