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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)".
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)
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);
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);
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