javascript中数组元素删除方法splice，用在for循环中巨坑

2023-08-26 13:28:58

一、demo

splice: 该方法会改变自动原始数组长度

实例：

 var array = ["aa","dd","cc","aa"];

   //方法2：删除数组元素

    array.splice(1,1);

   //输出结果：["aa","cc","aa"]

   getArray(array);

输出：aa

数组长度自动减一

在for循环中使y用 temp.splice(i, 1);

一定要记得跟着写i--

detect() {

let temp = [];

temp = this.tableBase;

let userName = this.search;

let count = 0;

for (let i = 0; i < temp.length; i++) {

if (!(temp[i].userName === userName)) {

console.log(temp[i].userName);

temp.splice(i, 1); //这种删除方式会自动更新长度，慎用

i--;

//delete temp[i];

count++;

console.log("删除");

}

console.log(count);

this.tableBase = temp;

console.log(this.tableBase);