You are not passing a hash to the sub. You flatten the hash to a list, pass that list, and build a new hash in the sub.

Either make the new hash also a tied hash, or pass a reference to the hash. The latter is more efficient, but if you change the hash inside the sub, the outer hash (which is the same) is changed as well.

In reply to Re: having a hash maintain order when passed to a sub by JavaFan
in thread having a hash maintain order when passed to a sub by metaperl

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