JavaScript implements the method of array and string mutual conversion _javascript techniques

The examples in this article describe the way JavaScript implements array and string mutual conversion. Share to everyone for your reference, specific as follows:

The array class can be defined as follows:

Copy Code code as follows:

var avalues = new Array ();

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

Copy Code code as follows:

var avalues = new Array (20);

The following 2 ways of defining are the same

Mode 1:

var acolors = new Array ();
Acolors[0] = "Red";
ACOLORS[1] = "green";
ACOLORS[2] = "Blue";
Alert (acolors[0]); Output "Red"

Mode 2:

var acolors = new Array ("Red", "green", "blue"); and array definition arrays are equivalent.
alert (acolors[0]);//output "red" too

(1) Array converted to string

The above 2 arrays are defined in such a way that the output is the same, and a comma separator is found in the middle.

Copy Code code as follows:

Alert (acolors.tostring ()); Output "Red,green,blue";

(2) string converted to array

We found that the array was converted to a string, with 1 more delimiters between the arrays ', ', and that string was converted to array arrays and must have delimiters. Can be a comma, or it can be another separator.

var scolors = "Red,green,blue";
var acolors = Scolors.split (', '); The string is converted to an array.

I hope this article will help you with JavaScript programming.