See each to iterate thru key/value pairs of a hash.

Copy to new hash in loop with changed key.

update

To answer the tread title, you can't. Keys are immutable. They can be deleted or created but they can't be changed.

Cheers Rolf

PS: Je suis Charlie!

In reply to Re: How can one change the keys of a hash to an alternative set of keys? by LanX
in thread How can one change the keys of a hash to an alternative set of keys? by tkguifan

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