How to delete the last element of a javascript array

How to delete the last element of a javascript array: 1. Use the length attribute to set the value of the attribute to 1 less than the original array length. The syntax is "arr.length=original array length-1"; 2. Use the pop() method of the array with the syntax "arr.pop()".

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

javascript array deletes the last element

Method 1: Use the length attribute----you can delete an or at the end of the array Multiple elements

The length attribute of an array is generally used to set or return the number of elements in the array, that is, to set or return the array length.

We can use the feature of setting the length of the array to set the length attribute smaller than the original length to delete one or more elements from the end of the array;

var a = [1,2,3,4,5,6,7,8];  //定义数组
a.length=7;
console.log(a)

var a = [1,2,3,4,5,6,7,8];  //定义数组
a.length=6;
console.log(a)

var a = [1,2,3,4,5,6,7,8];  //定义数组
a.length=3;
console.log(a)

If the value is set to 0, the entire array will be deleted, that is, the array will be cleared!

var a = [1,2,3,4,5,6,7,8];  //定义数组
a.length=0;
console.log(a)

Method 2: 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 and return the deleted element.

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

var a = [1,2,3,4,5,6,7,8];  //定义数组
a.pop();
console.log(a)

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