js数组删除指定索引

在JavaScript中，要删除数组中的指定索引，可以使用splice()方法或自定义方法remove()来实现。

使用splice()方法的示例代码如下：

var arr = [1, 2, 3, 4, 5, 6, 7];  //源数据
var delIndex = [3, 2, 4];  //需要删除源数据的所有索引

for (var i = delIndex.length - 1; i >= 0; i--) {
  arr.splice(delIndex[i], 1);
}

console.log(arr);  // [1, 2, 6, 7]

上述代码中，通过使用splice()方法从后往前删除数组元素，确保删除元素后的索引不会发生错位。

另一种方法是自定义remove()方法，示例代码如下：

Array.prototype.remove = function(dx) {
  if (isNaN(dx) || dx > this.length) {
    return false;
  }
  for (var i = 0, n = 0; i < this.length; i++) {
    if (this[i != this<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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