Here are a couple of techniques you can use:

my %employees = map {$_ => undef} qw(key1 key2 key3);

@employees{qw(key1 key2 key3)} = undef;

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Perl reduces RSI - it saves typing

In reply to Re: Assigning values to undef hash reference keys two or more at a time by GrandFather
in thread Assigning values to undef hash reference keys two or more at a time by gctaylor1

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