Except your code assumes strings too. For "objects", you'd need 

my %required;
@required{ map key($_), @required } = @required;
delete @required{ map key($_), @got };

warn "Skipper is missing: ", values %required;

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Where key is a suitable key-producing sub.

In reply to Re^4: map question (hash slice) by ikegami
in thread map question by catfish1116

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