javascript - 如何从JavaScript中删除数组中的元素？(How to remove element from an array in JavaScript?)

Question

var arr = [1,2,3,5,6];

I want to remove the 1st element of the array so that it becomes:

(我想删除数组的第一个元素，使其成为：)

var arr = [2,3,5,6];

To extend this question, what if I want to remove the 2nd element of the array so that it becomes:

(要扩展这个问题，如果我想删除数组的第二个元素，使其变为：)

var arr = [1,3,5,6];

  ask by user198729 translate from so

Answer 1

shift() is ideal for your situation.

(shift()非常适合您的情况。)

shift() removes the first element from an array and returns that element.

(shift()从数组中删除第一个元素并返回该元素。)

This method changes the length of the array.

(此方法更改数组的长度。)

array = [1, 2, 3, 4, 5];

array.shift(); // 1

array // [2, 3, 4, 5]