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JingchaoZhao / js-learning

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tips: Set,WeakSet,Map,WeakMap #6

Open JingchaoZhao opened 5 years ago

JingchaoZhao commented 5 years ago

Set 新的数据结构 类似于数组，成员唯一且无序

JingchaoZhao commented 5 years ago

WeakSet 只能储存弱引用对象； 可以被垃圾回收机制回收。 不能遍历

JingchaoZhao commented 5 years ago

Map 字典以 [key, value]的形式储存

JingchaoZhao commented 5 years ago

WeakMap 键必须是弱引用对象 不能遍历 键可以被垃圾回收

JingchaoZhao commented 5 years ago

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