Except, IMHO, the hash values are irrelevant. Codewise, it's easier to use undef as hash values: your 
@hash{qw(a b c)} = (1) x 3;

[download]
 then becomes 
@hash{qw(a b c)} = ();

[download]

That's a lot shorter, isn't it? And no need to count items.

In reply to Re^2: Using map to create a hash/bag from an array by bart
in thread Using map to create a hash/bag from an array by spurperl

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