Javascript method to convert Array and String to each other_javascript skills

The example in this article describes the method of converting Array and String in Javascript. Share it with everyone for your reference, the details are as follows:

The Array class can be defined as follows:

Copy code The code is as follows:

var aValues ​​= new Array();

If you know the length of the array in advance, you can pass the length as a parameter

Copy code The code is as follows:

var aValues ​​= new Array(20);

The following two definitions are the same

Method 1:

var aColors = new Array();
aColors[0] = "red";
aColors[1] = "green";
aColors[2] = "blue";
alert(aColors[0]); // output "red"

Method 2:

var aColors = new Array("red","green","blue"); // 和Array定义数组是等同的。
alert(aColors[0]); // output "red" too

(1) Array converted to string

The output of the above two array definition methods is the same, and there is a comma separator in the middle.

Copy code The code is as follows:

alert(aColors.toString()); // output "red,green,blue ";

(2) Convert string to Array

We found that when Array is converted into a string, there is an extra delimiter ',' between the arrays. Then when string is converted into an Array array, there must be a delimiter. It can be a comma or other delimiter.

var sColors = "red,green,blue";
var aColors = sColors.split(','); // 字符串就转换成Array数组了。

I hope this article will be helpful to everyone in JavaScript programming.