Re: How to create a hash whose values are undef?

Assuming your keys are in @keys:

my %hash;
@hash{@keys} = ();
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Comment on Re: How to create a hash whose values are undef? Download Code

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Re^2: How to create a hash whose values are undef? by Anonymous Monk on Jul 06, 2009 at 02:59 UTC
But what if I want @keys to be the keys in a second-level hash, like so: `$hash = {'foo' => { 'key1 => undef, 'key2' => undef, ...` [download] I am using a hash ref here, but I don't think that should make too much of a difference.	[reply] [d/l]
Re^3: How to create a hash whose values are undef? by GrandFather (Saint) on Jul 06, 2009 at 03:10 UTC
`@{$hash->{foo}}{@keys} = ();` [download] perlref and Slices may help True laziness is hard work	[reply] [d/l]