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03.22.2008 at 11:15AM PDT, ID: 23261680
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9.6

ActionScript 2.0 HowTo: Dynamically Create an Associative Array

Asked by the_sleeper in Macromedia Flash

Im Learning ActionScript
..So now i'm in the chapter on Arrays and they did a "fly-over" on Associative Arrays that left me with a whole bunch of "what if's"...

For example: What say i wanted to create an associative array of a small band 4 piece band wherein I tracked the "Instrument" as the Key, and the "Name" of the Musician as the Key's Value.

That I can do (see code snippet)

But, what if Im tracking an Orchestra of more than 20 musicians (assume each musician plays a DIFFERENT instrument to keep this easier). In this case, instead of hard-coding 20 keys/values I'd like to create a function which
 1. Adds the KEY, (in this case to an existing object) then
 2. Add's the Key's VALUE, to the new Key

I could then use this function in a loop or whatever... right? Problem is...I cant figure out how to assign the keys VALUE! I may be approaching this all wrong, but I sure would like to know if this can be done.

TIA,
sleeper



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// HowTo: Dynamically Create an Associative Array?
 
// The Static Way (Known)
var oBeatles:Object = new Object();
 oBeatles["bass"] = "Paul McCartney";
 trace("Hard Coded: " + oBeatles.bass);
		
// The Dynamic Way (???)
 
// 1.) I Create an Associative Array Object (globally, so both functions couold access it)
var oColl:Object = new Object();
 
// 2.) Created a function to add a key to the array
function addKey(oArray:Object, kName:String):String
// this function dynamically creates a Key in the Array
{
 // a. create a new key for the object
    oArray[kName] = kName; // adds a key called "name" to the array
    var akSuccess:String = "Key added: " + oArray[kName];	
    return akSuccess;
}
 
// 3.) Create a function to add a value to the newly created key
 
function addKeyValue(oArray:Object,kValue:String):String
// this function dynamically adds ther value tot eh newly create key
{
    oArray["kName"] = kValue;
 // compile success message
    var akvSuccess:String = "Key Value added: " + oArray["kName"];
    return akvSuccess;
}
 
// I want this to display the VALUE (Paul McCartney) of the Bass Key
trace(addKeyValue("Dynamic: " + oColl.Bass));
 
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[+][-]03.22.2008 at 12:12PM PDT, ID: 21187408

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[+][-]03.22.2008 at 12:27PM PDT, ID: 21187445

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[+][-]03.22.2008 at 12:59PM PDT, ID: 21187563

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[+][-]03.22.2008 at 01:11PM PDT, ID: 21187602

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Zone: Macromedia Flash
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Solution Provided By: julianopolito
Participating Experts: 1
Solution Grade: A
 
 
[+][-]03.22.2008 at 03:28PM PDT, ID: 21187951

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