Array.Concat  

function Concat (array : Array, optionalArray0 : Array, optionalArray1 : Array) : Array

Description

Concat joins two or more arrays. The method does not change the existing arrays

and returns a copy of the joined array

function Start () {
    var arr = new Array ("Hello", "World");
    var arr2 = new Array ("!");

    // joined now contains all 3 strings        
    var joined = arr.Concat(arr2);
    
    // prints "Hello","World","!"    
    print(joined);
}