You could replace
foreach $key (%index){
      delete $index{$key} if ($key =~ /$test.+/);
}

[download]

in the original code with a one-liner:

foreach (keys %index) { delete $index{$_} if /$test.+/ }

[download]
Where the keyword "keys" returns a list of all the hash keys. The new version does not generate warnings.

In reply to Re: Hashes: Deleting elements while iterating by Roger
in thread Hashes: Deleting elements while iterating by knexus

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