How to delete array array elements in JavaScript

JavaScript method to delete array array elements: 1. Use [splice()] to delete, the code is [console.log(arr.splice(1, 2))]; 2. Use the delete operator to delete.

The operating environment of this tutorial: Windows 7 system, JavaScript version 1.8.5, DELL G3 computer.

JavaScript method to delete array array elements:

1. splice() deletion:

var arr = ["犀牛前端部落", 4, "青岛市南区", "pipipi.net"];
console.log(arr.splice(1, 2));
console.log(arr);

The code can delete the array elements with index values ​​1 and 2.

The splice method returns a new array composed of deleted elements; this method directly operates the original array.

For the splice method, please refer to the JavaScript splice() chapter.

2. Delete with delete operator:

You can also delete specified array elements using the delete operator.

The code example is as follows:

var arr = ["犀牛前端部落", 4, "青岛市南区", "pipipi.net"];
delete arr[1];
for (var index = 0; index < arr.length; index++) {
  console.log("index:" + index+",数组值:"+arr[index]);
}

This operator deletes array elements. The length of the array will not change, but the element value of the corresponding index will be changed to undefined.

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