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  1. or download this
    use strict;
use warnings;
...

# oh! my birthday, i'm getting older
$hash{'ege'} = "1001";  # oops, just TRIED to add new key.
  2. or download this
    Attempt to access disallowed key 'ege' in a restricted hash at 
C:\Perl\scripts\hashtest.pl line 14.