JavaScript Set vs Map vs WeakSet vs WeakMap

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Compared to a plain old JavaScript object (POJO) when would you want a map or set? How to make a Set using a POJO + generator + symbol?
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If the goal of this tutorial is to teach something new in coding, it's hard to both follow code, and your talk that is not in sync with the code you're writing (for the most parts).
Thank you in any case for the tutorial!

RezaMohseni