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    Kind of nice to have a background story. Could use a test for the move method, as it's mentioned in the description.

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    +1 to code quality metrics.

    • performance a la JSPerf
    • unminified size
    • minified size
    • readability (probably impossible to automate, so upvote option would be neat)

    It's hard to write something that is at the same time really efficient, small and yet readable. For me, that's elegant code. Maybe one metric could be all the others combined.