User Guide

= (assignment) 79

The following example uses assignment by reference to create the moonsOfJupiter variable,

which contains a reference to a newly created Array object. Assignment by value is then used to

copy the value

"Callisto" to the first element of the array referenced by the variable

moonsOfJupiter:

var moonsOfJupiter:Array = new Array();

moonsOfJupiter[0] = "Callisto";

The following example uses assignment by reference to create a new object, and assign a reference

to that object to the variable

neptune. Assignment by value is then used to assign the value of

49528 to the size property of the myObject object:

var mercury:Object = new Object();

mercury.diameter = 3030; // in miles

trace (mercury.diameter); // output: 3030

The following example builds upon the previous example by creating a variable named merkur

(the German word for mercury) and assigning it the value of

mercury. This creates two variables

that reference the same object in memory, which means you can use either variable to access the

object’s properties. We can then change the diameter property to use kilometers instead of miles:

var merkur:Object = mercury;

merkur.diameter = 4878; // in kilometers

trace (mercury.diameter); // output: 4878