I use them to great effect with results fetched from an SQL query. There, locked hashes have made it very obvious when my code tries to access elements which have been renamed in the SQL query, which has reduced the time to debug these things.

But when I'm at liberty to name the hash entries myself, I don't feel the need for restricted hashes.

In reply to Re^2: strict "vars" mode for hash key literals? by Corion
in thread strict "vars" mode for hash key literals? by perlancar

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