FLASH® LITE™ 2.x - Adobe Help and Support

The following example creates a nested array that contains two arrays. The first array has three
elements: Europa, Io, and Callisto. The second array has two elements: Titan and Rhea. It
joins the array by using a plus sign (+), but the elements within each nested array remain
separated by commas (,).
var a_nested_array:Array = new Array(["Europa", "Io", "Callisto"],
["Titan", "Rhea"]);
trace(a_nested_array.join(" + "));
// Returns Europa,Io,Callisto + Titan,Rhea.
See also
split (String.split method)
length (Array.length property)
public length : Number
A non-negative integer specifying the number of elements in the array. This property is
automatically updated when new elements are added to the array. When you assign a value to
an array element (for example, my_array[index] = value), if index is a number, and
index+1 is greater than the length property, the length property is updated to index+1.
Note: If you assign a value to the length property that is shorter than the existing length, the
array will be truncated.
Example
The following code explains how the length property is updated. The initial length is 0, and
then updated to 1, 2, and 10. If you assign a value to the length property that is shorter than
the existing length, the array will be truncated:
var my_array:Array = new Array();
trace(my_array.length); // initial length is 0
my_array[0] = "a";
trace(my_array.length); // my_array.length is updated to 1
my_array[1] = "b";
trace(my_array.length); // my_array.length is updated to 2
my_array[9] = "c";
trace(my_array.length); // my_array.length is updated to 10
trace(my_array);
// displays:
//
a,b,undefined,undefined,undefined,undefined,undefined,undefined,undefine
d,c
// if the length property is now set to 5, the array will be truncated
my_array.length = 5;
trace(my_array.length); // my_array.length is updated to 5
238 ActionScript classes