JS method to implement Array and String conversion

The Array function is a core component of PHP. No installation is required to use these functions. string is a string in programming languages. In this article, we will share with you the method of converting Array and String in Javascript. We hope it can help you.

The Array class can be defined as follows:

var aValues = new 
Array();

If you know the length of the array in advance, you can pass the length with parameters

var aValues ​​= new Array(20);

The following two definition methods 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) Convert Array to string

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

Copy the code The code is as follows:

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

(2) Convert string to Array

We found that Array is converted to string, and there are more between arrays 1 delimiter ',' , then to convert the string 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。

The above content is how Javascript implements conversion between Array and String. I hope it will be helpful to everyone.

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