Here's a related question, perhaps suitable for meditation: If I initialize a hash with redundant keys, do I get predictable results? That is, are the following two examples equivalent?

    %a = (one => 'eins',
          two => 'zwei',
          three => 'drei',
          one => 'uno');

    %b = (one => 'eins',
          two => 'zwei',
          drei => 'drei');
    $b{one} = 'uno';
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