diff --git "a/47\346\233\276\345\276\267\346\243\256/2022-10-27-map\345\222\214set/.keep" "b/47\346\233\276\345\276\267\346\243\256/2022-10-27-map\345\222\214set/.keep"
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+
+
+
+
+
+
+ Document
+
+
+
+
+
\ No newline at end of file
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+## map
+
+//引用型：function,array,obj
+
+//map
+
+`var ma =new map();`
+
+`console.log(typeof ma); //ma是对象`
+
+`ma.set(5,'Zoe');`
+
+
+
+### 删
+
+delete:map.delete(key) :根据键删除，那就删除成功，返回ture，否则返回false
+
+1、`ma.delect(5);`
+
+ `console.log(ma)`
+
+2、`var result =ma.delete(5);`
+
+ `console.log(result)`
+
+3、`var re=ma.clear() //清空数据，无返回值`
+
+ `console.log(re)`
+
+
+
+### 改
+
+`ma.set(5，'Zoe')`
+
+
+
+### 查
+
+`for (let e of ma.keys()){`
+
+ `console.log(e)`
+
+} //查找键5，keys
+
+
+
+`for (let e of ma.values()){`
+
+ `console.log(e)`
+
+} //查找值 'Joe',' Zoe'
+
+
+
+//obj不可迭代 let[k,v]=[键，值]
+
+ `ma.forEach(`
+
+ `e=>console.log(e)`
+
+)
+
+## set
+
+//set:（装不重复的元素）数组
+
+`set.add(5);`
+
+`set.add(+0),add(1),add(2);`
+
+`set.add(-0);`
+
+`set. add(NaN);`
+
+`set.add(null);`
+
+//weak set,weak map 弱引用
+
+//set 去重
+
+`const nums = [1,2,3,4,3,2,1]`
+
+`uniq1 = [...new Set(nums)]`
+
+
+