[Xerte] Loop through an object?

[Dave Burnett]

Paul, tried it before I posted:

tempGroup = new Object();
tempGroup.a = "1";
tempGroup.b = "2";
tempGroup.c = "3";

for (var prop in tempGroup) {
    debug("myObject." + prop + " = " + tempGroup[prop]);
} 



Nothing.






Subject: RE: [Xerte] Loop through an object?
Date: Wed, 13 Oct 2010 15:46:17 -0700
From: Paul.Swanson at harlandfs.com
To: xerte at lists.nottingham.ac.uk
















Use the for..in statement:

 

for..in Statement

 

Usage

                

 

for (variableIterant in object) {

    statement(s); 

} 

 

Player version:  Flash Player 5

 

Iterates over the properties of an object or elements in an array
and executes the statement for each property or element. Methods of an object
are not enumerated by the for..in action.

 

Some properties cannot be enumerated by the for..in action. For
example, movie clip properties, such as _x and _y, are not enumerated. In
external class files, static members are not enumerable, unlike instance
members.

 

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 ({}) that are used to enclose the block of
statements to be executed by the for..in statement are not necessary if only
one statement is executed.

 

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 uses 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 uses 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); 

    } 

}

 

Note: If you have several movie clips, the output consists of the
instance names of those clips.

 

The following example enumerates the children of a movie clip and
sends each to Frame 2 in its respective Timeline. The RadioButtonGroup movie
clip is a parent with three children: _RedRadioButton_, _GreenRadioButton_,,
and _BlueRadioButton_.

 

for (var name in RadioButtonGroup) {
RadioButtonGroup[name].gotoAndStop(2); }

 







From:
xerte-bounces at lists.nottingham.ac.uk
[mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Dave Burnett

Sent: Wednesday, October 13, 2010 3:35 PM

To: Xerte list

Subject: [Xerte] Loop through an object?





 



myobject = new Object();





myobject[130] = "alpha";

myobject[230] = "bravo";

myobject[330] = "charlie";



Not knowing the numerics that will wind up in there, how do I loop through it?



e.g. I want to match the alpha values to something else and get the property.

















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