FYI, about the uniqueness in the array and sorting algorithm, you can use a prolog-like system to build your %pets. The trick is to negate clauses which are true so that your system inferes faster. It's a bit over the top but here's the stuff on CPAN : https://metacpan.org/search?q=prolog

In reply to Re^3: Struggling with complex data structures and doing useful operations on their elements and populating from arrays by v-zor
in thread Struggling with complex data structures and doing useful operations on their elements and populating from arrays by hiyall

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