Conversion of JavaScript Array and string

The array class can be defined as follows:

var avalues = new Array ();

If you know the length of the array beforehand, you can pass the length with the parameter

var avalues = new Array (20);

------------------the following 2 ways to define the same--------1-----------

var acolors = new Array ();

Acolors[0] = "red";

ACOLORS[1] = "green";

ACOLORS[2] = "Blue";

Alert (acolors[0]); Output "Red"

-------------------------------------------------2-----------

var acolors = new Array ("Red", "green", "blue"); and array definition arrays are equivalent.

Alert (acolors[0]); Output "Red" too

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(1) Array converted to string

The above 2 kinds of array definitions, the output is the same, found in the middle there is a comma separator.

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

(2) string converted to array

We found that the array was converted to a string, there were 1 more delimiters ', ' between the arrays, and then the string was converted to array arrays, which had to be delimited. It can be a comma, or it can be a separate delimiter.

var scolors = "Red,green,blue";

var acolors = Scolors.split (', '); The string is converted into an array of arrays.

Conversion of JavaScript Array and string