⭐ in reply to How do I empty out a hash?

Hi,

To delete a key, you don't need to know her value.
Here's my code : 

my %hash = ( Carol => 22, Mary => 21, Chris => 30 );
map { delete $hash{$_} } keys %hash;

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Update: Of course this makes use of map in void context. Yick. And a couple other suggestions came in by way of followup:

Arnaud

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Re: Answer: How do I empty out a hash?
by Aristotle (Chancellor) on Oct 04, 2003 at 16:10 UTC
    Easier yet. 
    delete @hash{(keys %hash)};

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    Update: this is, of course, only useful when you want to use delete the keys from one hash in another one, as in 
    delete @foo{(keys %bar)};

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    Otherwise, only the below solution makes any sense.

    Makeshifts last the longest.

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      Even more easier! 

      %hash = ();

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      And twice more quicker also.

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