操作数组 - 插入元素

Posted 2021-03-22 yuyedaocao

1、push , unshift

2、splice

var arr3 =  [1,2,3,4,6];
var result = arr3.splice(2,0,"sdf") //第二个位置,删除0个元素,插入值
console.log(arr3)  // [1, 2, "sdf", 3, 4, 6]