es6 & map & set

es6 & map & set

Map & WeakMap

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakMap

Set & WeakSet

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakSet

blogs

https://es6.ruanyifeng.com/#docs/set-map

https://medium.com/front-end-weekly/es6-map-vs-object-what-and-when-b80621932373

refs

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