Re^2: How to test for empty hash?

This is a bit confusingly written.

The question was about checking if a hash is empty, and %h in scalar context can be used to do this portably (though the relative recent change makes it more efficient).

That said,

%h in scalar context can't be used to get the number of keys portably.

keys(%h) in scalar context can be used to get the number of keys portably and efficiently.

That's not true. You could aways use There was a relatively recent change thatefficiency of hash in boolean context

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Re^3: How to test for empty hash? by Anonymous Monk on Aug 06, 2021 at 11:01 UTC
This is a bit confusingly written. That's not true. You could aways use There was a relatively recent change thatefficiency of hash in boolean context	[reply]