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vipAllDay
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es6

e 1 year ago
parent
c329f3d0b6
commit
36cd6d4e5a
3 changed files with 91 additions and 0 deletions
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  1. 25 0
      js/js高阶/12.Symbol.html
  2. 28 0
      js/js高阶/13.Set.html
  3. 38 0
      js/js高阶/14.Map.html

+ 25 - 0
js/js高阶/12.Symbol.html
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+<!DOCTYPE html>
 
+<html lang="en">
 
+<head>
 
+    <meta charset="UTF-8">
 
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
+    <title>Document</title>
 
+</head>
 
+<body>
 
+    <script>
 
+        /**
 
+         * js数据类型：
 
+         * 基本数据类型：
 
+         *  number string boolean null undefined 
+         *  Symbol(独一无二的 唯一的)
 
+         * 引用数据类型
 
+         * Object(object array function)
 
+        */
 
+       var a = Symbol();
 
+       console.log(a);
 
+       var a1 = Symbol(1);
 
+       var a2 = Symbol(1);
 
+       console.log(a1 == a2);
 
+    </script>
 
+</body>
 
+</html>

+ 28 - 0
js/js高阶/13.Set.html
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+<!DOCTYPE html>
 
+<html lang="en">
 
+<head>
 
+    <meta charset="UTF-8">
 
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
+    <title>Document</title>
 
+</head>
 
+<body>
 
+    <script>
 
+        var arr = [1,2,3,4,3,3,5,7,213];
 
+        var x = new Set(arr);
 
+        console.log(x,'set后')
 
+        console.log(Array.from(x));
 
+        // size 长度
 
+        console.log(x.size)
 
+        // 数组去重
 
+        function fn1(aa) {
 
+           return Array.from(new Set(aa));
 
+        }
 
+        console.log(fn1([1,2,1,1,1,1,1,2,2,2,3,4,3,4,33,2]));
 
+        // 添加 xxx.add()
 
+        console.log(x.add("哈哈"))
 
+        // 删除 xxx.delete(要删除的值) 成功则返回true
 
+        console.log(x.delete(3));
 
+        console.log(x);
 
+    </script>
 
+</body>
 
+</html>

+ 38 - 0
js/js高阶/14.Map.html
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+<!DOCTYPE html>
 
+<html lang="en">
 
+<head>
 
+    <meta charset="UTF-8">
 
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
+    <title>Document</title>
 
+</head>
 
+<body>
 
+    <script>
 
+        let s1 = new Map();
 
+        console.log(s1);
 
+        // xxx.set("属性名","属性值")
 
+        s1.set('names','张三');
 
+        s1.set('age',18);
 
+        console.log(s1);
 
+        // xxx.get("属性名")
 
+        console.log(s1.get('names'))
 
+        // 长度 xxx.size
 
+        console.log(s1.size)
 
+        // 删除 xxx.delete("属性名") 成功 true
 
+        // console.log(s1.delete("age"))
 
+        // 全部删除 xxx.clear
 
+        // console.log(s1.clear());
 
+        // keys 可枚举的键值对的属性
 
+        for(var i of s1.keys()) {
 
+            console.log(i)
 
+        }
 
+        // entries 可枚举的键值对
 
+        for(var i of s1.entries()) {
 
+            console.log(i)
 
+        }
 
+        // values 可枚举的键值对属性值
 
+        for(var i of s1.values()) {
 
+            console.log(i)
 
+        }
 
+    </script>
 
+</body>
 
+</html>