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

The for..in statement iterates over properties of objects in the iterated object's prototype
chain. Properties of the object are enumerated first, then properties of its immediate
prototype, then properties of the prototype's prototype, and so on. The for..in statement
does not enumerate the same property name twice. If the object child has prototype parent
and both contain the property prop, the for..in statement called on child enumerates prop
from child but ignores the one in parent.
The curly braces ({}) used to enclose the block of statements to be executed by the for..in
statement are not necessary if only one statement will execute.
If you write a for..in loop in a class file (an external AS file), then instance members are not
available for the loop, but static members are. However, if you write a for..in loop in a FLA
file for an instance of the class, then instance members are available but static ones are not.
Parameters
variableIterant:String - The name of a variable to act as the iterant, referencing each
property of an object or element in an array.
Example
The following example shows using for..in to iterate over the properties of an object:
var myObject:Object = {firstName:"Tara", age:27, city:"San Francisco"};
for (var prop in myObject) {
trace("myObject."+prop+" = "+myObject[prop]);
}
//output
myObject.firstName = Tara
myObject.age = 27
myObject.city = San Francisco
The following example shows using for..in to iterate over the elements of an array:
var myArray:Array = new Array("one", "two", "three");
for (var index in myArray)
trace("myArray["+index+"] = " + myArray[index]);
// output:
myArray[2] = three
myArray[1] = two
myArray[0] = one
The following example uses the typeof operator with for..in to iterate over a particular
type of child:
for (var name in this) {
if (typeof (this[name]) == "movieclip") {
trace("I have a movie clip child named "+name);
}
}
Statements 183