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Set #218

Closed

xiaoxixi6633 opened this issue Jul 25, 2019 · 0 comments

xiaoxixi6633 commented Jul 25, 2019

Set
1.成员不能重复
2.只有健值，没有健名，有点类似数组。
3. 可以遍历，方法有add, delete,has
weakSet

成员都是对象
成员都是弱引用，随时可以消失。可以用来保存DOM节点，不容易造成内存泄漏
不能遍历，方法有add, delete,has
Map
本质上是健值对的集合，类似集合
可以遍历，方法很多，可以干跟各种数据格式转换
weakMap
1.直接受对象作为健名（null除外），不接受其他类型的值作为健名
健名所指向的对象，不计入垃圾回收机制
不能遍历，方法同get,set,has,delete

Originally posted by @1138663994 in #6 (comment)

yygmind closed this as completed

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