Your $data and @_ are empty here, so this won't work the same because of autovivication. The number of $VAR variables is different, because you have a .. d in the first and a .. c in the second expample.

All of this should work if you actually fill $data and $_[3] with a hash reference that uses those keys.

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re^3: Trying to optimize de-referenced hash slice without scope variables... by Joost
in thread Trying to optimize de-referenced hash slice without scope variables... by monsieur_champs

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