Exactly (that's why I said "some other value").
Otherwise it could be done thus:
my %hash;
@hash{@keys} = undef;

[download]
No need for the x operator. This sets the first value to undef, the others are unspecified so are set to undef as well.

In reply to Re^5: How to create a hash whose values are undef? by cdarke
in thread How to create a hash whose values are undef? by Anonymous Monk

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