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How to delete the last element of javascript array

青灯夜游
青灯夜游Original
2021-11-25 18:04:346171browse

Delete method: 1. Use the pop() method of Array, the syntax is "array.pop()"; 2. Use the delete operator, the syntax is "delete arr[arr.length-1]"; 3. Use splice() method, syntax "arr.splice(-1,1)".

How to delete the last element of javascript array

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

Method 1: Use the pop() method----you can delete an element at the end of the array

array.pop() method can delete the last element in the array element and returns the deleted element.

Let’s take a closer look at the following example:

var arr = [2,4,6,8,10];  //定义数组
arr.pop();
console.log(arr)

How to delete the last element of javascript array

Method 2: Use the delete operator to delete the last element of the array

var arr = [2,4,6,8,10];  //定义数组

var len=arr.length;//计算数组长度
delete arr[len-1];  //删除最后一个元素(数组长度-1)
console.log(arr);

How to delete the last element of javascript array

Method 3: Use splice() method

var arr= [1,2,3,4,5];

//从倒数第二个元素开始,截取两个元素
arr.splice(-1,1);
console.log(arr);

How to delete the last element of javascript array

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