p4raw-id: //depot/cfgperl@4294
given field has been used yet. It acts this way to match the behavior
of a regular hash. For instance:
- $phash = [{foo =>, bar => 2, pants => 3}, 'FOO'];
+ $phash = [{foo =>1, bar => 2, pants => 3}, 'FOO'];
$phash->{pants} = undef;
exists $phash->{foo}; # true, 'foo' was set in the declaration