So it appears we have yet another inconvenient and/or incomplete way to check whether something can be used as a hash.

The hash example was an analogy--an analogy of a different type of allomorphism already present in Perl 5.

In reply to Re^3: I don't understand UNIVERSAL::DOES() (hash method?!) by chromatic
in thread I don't understand UNIVERSAL::DOES() by rlb3

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