myArray.concat( [ item1 ], [ item2 ], [ ... ] ) in ECMAScript 262

Concatenates one or more items or arrays onto the current array.

Arguments

name	type	description
item1	Object	[optional] The first item to add.
item2	Object	[optional] The second item to add.
...	Object	[optional] etc.

Return Type: Array

Description

This method takes an arbitrary number of parameters, and concatenates the values onto the calling array object. As with most ECMAScript object methods, the calling object is not modified; instead, the result of the operation is returned as a new array. If no arguments are supplied, a duplicate of the current array is returned. (Not a pointer to the same array.) If any argument is itself an array, then the contents of that array are added, not the array itself. In other words:

var hisColors = [ 'blue', 'red' ];
var herColors = [ 'purple' , 'pink', 'yellow' ];
var hisAndHers = hisColors.concat(herColors);
    //hisColors is still ['blue','red'];
    //hisAndHers is ['blue','red','purple','pink','yellow']
    //it is NOT ['blue','red',['purple','pink','yellow']]

var someColors = hisColors.concat( 'orange' , 'green' , ['black', 'white'] );
someColors.toString(); //blue,red,orange,green,black,white