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#!/usr/bin/env perl use Modern::Perl '2018'; my @indices = (0 .. 25); my @letters = ('A' .. 'Z'); my %index; @index{@letters} = @indices; say "array: ", @letters[9, 0, 15, 7]; say "hash: ", join ", ", @index{'J', 'A', 'P', 'H'};