User Guide

Looping 89

{

trace(myArray[i]);

}

// output:

// one

// two

// three

What you cannot do is iterate through the properties of an object if it is an instance of a user-

defined class, unless the class is a dynamic class. Even with instances of dynamic classes, you

will be able to iterate only through properties that are added dynamically.

for each..in

The for each..in loop iterates through the items of a collection, which can be tags in an

XML or XMLList object, the values held by object properties, or the elements of an array. For

example, as the following excerpt shows, you can use a

for each..in loop to iterate through

the properties of a generic object, but unlike the

for..in loop, the iterator variable in a for

each..in

loop contains the value held by the property instead of the name of the property:

var myObj:Object = {x:20, y:30};

for each (var num in myObj)

{

trace(num);

}

// output:

// 20

// 30

You can iterate through an XML or XMLList object, as the following example shows:

var myXML:XML = <users>

<fname>Susan</fname>

</users>;

for each (var item in myXML.fname)

{

trace(item);

}

/* output

Jane

Susan

John