好久没更新了

2021-03-23 10:58:10 +08:00
parent eca64f86c0
commit 9bf8e8d020
123 changed files with 24337 additions and 214 deletions
--- a/js/demo/diguibibao.html
+++ b/js/demo/diguibibao.html
@@ -0,0 +1,97 @@
+<!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> 
+        // 递归   函数内部调用他自己    必须有个终点
+        let num = 0;
+        function a(index){
+            if(index == 0){
+                return 0;
+            }else {
+                return index + a(index - 1)
+                //10+a(9)
+                //10+9+a(8)
+                //10+9+8+a(7)
+                //.....
+                //10+9+8+7+......+3+2+1+0
+                
+                
+            }
+        }
+        num = a(10)
+        alert(num)
+        
+        // function a (){
+        //     let b = 100;
+        //     return function (){
+        //         b++;
+        //         return b;
+        //     }
+        // }
+        // let c = a()
+        // alert(c())
+        // alert(c())
+        // alert(c())
+        // alert(c())
+        // alert(c())
+      
+        function a (){
+            let name = "123"
+            var shop = {
+                a: "商品c",
+                b: "商品d"
+            }
+            return {
+                name: "321",
+                getname(name){
+                    return "商品" + name +"的值是" +  shop[name]
+                },
+                addshop(name1,item){
+                    shop[item] = name1 // shop['pingguo']="苹果"
+                    alert(this.name)  //543
+                },
+                getlist(){
+                    return shop
+                },
+                setname(name){
+                    this.name = name
+                }
+            }
+        }
+        let sa = a()   
+        alert(sa.getname('a'))   //商品a的值是商品c
+        sa.setname("543")  // sa.name = 543
+        sa.addshop("苹果","pingguo") //543
+        alert(sa.getname('pingguo')) //商品pingguo的值是、苹果
+
+        console.log(sa.getlist())
+        function b (){
+            var shop = {
+                a: "商品a",
+                b: "商品b"
+            }
+            return {
+                getname(name){
+                    return "商品" + name +"的值是" +  shop[name]
+                },
+                addshop(name,item){
+                    shop[item] = name
+                },
+                getlist(){
+                    return shop
+                }
+            }
+        }
+        let sb = b()
+        
+        // 递归 生成杨辉三角
+        // 闭包 封装一个累加器 调用add 方法+1 调用get方法 获取现在的累加值 ‘当前值是 ’ 
+    </script>
+</body>
+</html>