Well, if you really don't care about whether the keys remain in their original case or not, you can do something like this (untested): 
  $assoc{lc $_} = delete $assoc{$_} for keys %assoc;

[download]
This will convert all keys to lower case. Then to check, you make sure the key is lc()ed: 
  print $assoc{lc 'theKEY'} . "\n";

[download]
HTH.

In reply to Re: case-insensitive hash keys by qumsieh
in thread case-insensitive hash keys by ManFromNeptune

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