From ae2c7fd3bd922f9edbf12ac5bd35efbf0c160a4d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=BB=84=E5=AF=8C=E8=B4=B5?= <2380003452@qq.com>
Date: Fri, 28 Oct 2022 04:11:30 +0000
Subject: [PATCH] =?UTF-8?q?=E9=BB=84=E5=AF=8C=E8=B4=B5?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: 黄富贵 <2380003452@qq.com>
---
 ...0-27-map&set\344\275\234\344\270\232.html" | 38 +++++++++++
 .../10-27-map&set\347\254\224\350\256\260.md" | 67 +++++++++++++++++++
 2 files changed, 105 insertions(+)
 create mode 100644 "36\351\273\204\345\257\214\350\264\265/10-27\344\275\234\344\270\232/10-27-map&set\344\275\234\344\270\232.html"
 create mode 100644 "36\351\273\204\345\257\214\350\264\265/10-27\344\275\234\344\270\232/10-27-map&set\347\254\224\350\256\260.md"
diff --git "a/36\351\273\204\345\257\214\350\264\265/10-27\344\275\234\344\270\232/10-27-map&set\344\275\234\344\270\232.html" "b/36\351\273\204\345\257\214\350\264\265/10-27\344\275\234\344\270\232/10-27-map&set\344\275\234\344\270\232.html"
new file mode 100644
index 0000000..ccd1451
--- /dev/null
+++ "b/36\351\273\204\345\257\214\350\264\265/10-27\344\275\234\344\270\232/10-27-map&set\344\275\234\344\270\232.html"
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Document</title>
+</head>
+<body>
+    <script type="text/javascript">
+        //1.将map转成对象
+        //map.set('name','Zoe').set('age',16).set('gender','male')
+
+        var map = new Map();
+        map.set('name','Zoe').set('age',16).set('gender','male')
+        var a = {}
+        for ([k,v]of map){
+            a[k]=v;
+        }
+        console.log(a);
+
+        var b = {
+            name:"Zoe",
+            age:16,
+            gender:'male'
+        }
+
+        var map1 = new Map();
+        var obj = Object.entries(b);
+        console.log(obj);
+        for([k,v] of obj){
+            map1.set(k,v)
+        }
+        console.log(map1);
+
+    </script>
+</body> 
+</html>
\ No newline at end of file
diff --git "a/36\351\273\204\345\257\214\350\264\265/10-27\344\275\234\344\270\232/10-27-map&set\347\254\224\350\256\260.md" "b/36\351\273\204\345\257\214\350\264\265/10-27\344\275\234\344\270\232/10-27-map&set\347\254\224\350\256\260.md"
new file mode 100644
index 0000000..5c7f729
--- /dev/null
+++ "b/36\351\273\204\345\257\214\350\264\265/10-27\344\275\234\344\270\232/10-27-map&set\347\254\224\350\256\260.md"
@@ -0,0 +1,67 @@
+第九课
+
+1.引用型:function, array, obj, 
+
+​    // ES6: map set
+
+`console.log(Map.prototype);`
+
+//Map:键值对，类似于对象
+
+2.delete:map.delete(key):根据键删除,如果找到该键，那就删除成功，返回true,否则返回false.
+
+3. var re = ma.clear() //清空数据，无返回值
+
+4. obj:不可迭代   let[k,v]  = [键,值]
+
+    
+
+   ```
+       for(let[k,v] of ma){
+   
+          console.log(k,v);
+   ```
+
+    例：map转数组 []
+
+   ```
+   const arr = [...map]
+   
+       const arr = []
+   
+       for(let e of map.entries()){
+   
+       arr.push(e)
+   
+        }
+   ```
+
+   数组转map
+
+   ```
+     const arr = [['name', 'zoe'], ['age', 18]]
+   
+       var map = new Map([
+   
+       ['name', 'zoe'], ['age', 18]
+   
+      ])
+   ```
+
+   //set:(装不重复的元素)数组
+
+   //set,map:+0,-0,0 :同一个元素 NaN
+
+   5.WeakSet 和WeakMap:弱引用(直接回收)，强引用(不会强制回收)
+
+   ```
+     var weakset = new WeakSet()
+   
+       var name = 'Joe'
+       var map = new Map();
+       map.set(name,'Zoe')
+   	var weakmap = new WeakMap();
+   	weakmap.set(name,'Zoe')
+   ```
+
+   
\ No newline at end of file
-- 
Gitee

