1、扩展运算符

  1.     <script>
  2.         let arrays = [1, 2, "abc"];
  3.         console.log(...arrays);
  4.     </script>

2、替代apply方法

  1.     <script>
  2.         //从一个数组中找出最大的数
  3.         let arrays = [1, 2, 3, 4, 5];
  5.         //es5的写法
  6.         console.log(Math.max.apply(null, arrays));
  8.         //es6的写法
  9.         console.log(Math.max(...arrays));
  10.     </script>

3、数组合并

  1.     <script>
  2.         //合并数组
  3.         let arrays1 = [1, 2, 3, 4, 5];
  4.         let arrays2 = [6, 7, 8, 9, 10];
  6.         //es5的写法
  7.         console.log(arrays1.concat(arrays2));
  9.         //es6的写法
  10.         console.log([...arrays1, ...arrays2]);
  11.     </script>

4、Array.from方法

作用：将伪数组转为真正的数组
伪数组有：1、arguments 2、元素集合 3、类似数组的对象

  1.     <script>
  2.         // 1、arguments 
  3.         function add(){
  4.             console.log(arguments);
  5.             console.log(arguments[0]);
  6.             console.log(arguments[1]);
  7.             console.log(arguments[2]);
  8.             //arguments.push(40);            //error arguments.push is not a function
  10.             //把arguments转化为真正可操作的数组
  11.             let arrays = Array.from(arguments);
  12.             arrays.push(40);
  13.             arrays.push(50);
  14.             console.log(arrays);
  15.         }
  16.         add(10,20,30);
  17.     </script>
  1. <body>
  2.     <div></div>
  3.     <div></div>
  4.     <div></div>
  5.     <script>
  6.         // 2、元素集合
  7.         let divs = document.getElementsByTagName("div");
  8.         console.log(divs);
  9.         //divs.push(10);     //error divs.push is not a function
  11.         // 把元素集合转化为可操作的数组
  12.         let arrays = Array.from(divs);
  13.         arrays.push(10);
  14.         arrays.push(20);
  15.         console.log(arrays);
  16.     </script>
  17. </body>
  1.     <script>
  2.         // 3、类似数组的对象
  3.         let user = {
  4.             "0":"azhi",
  5.             "1":18,
  6.             "2":"男",
  7.             length:3
  8.         }
  10.         let arrays = Array.from(user);
  11.         arrays.push(80);
  12.         console.log(arrays);
  13.     </script>

5、Array.of方法

将一组值转化为数组

  1.     <script>
  2.         let arrays = Array.of(1,2,3,4,5,6,7,8);
  3.         console.log(arrays);
  4.     </script>