Note: How To Retrieve Variables From Function To Another

[demolaynyc 0]

I have been having troubles with this but I found out a solution to this. The problem is to declare variables inside a function and retrieve its value from another function--but that doesn't work.

 

Here is an example of the wrong thing to do:

 

function firstFunc () {	 var aVariable = oneValue;}function getVariable () {	 trace (aVariable);}

The trace would return (undefined) because it is undefined in that exact function.

 

Solution:

do not declare variables inside a function. If you have to, use _root.variableName instead of var variable Name

 

Here's a sample code:

 

function firstFunc () {	 _root.aVariable = oneValue;}function getVariable() {	 trace(_root.aVariable);}

So, tell me what you think. And if there's a better alternative please do post it.

[seec77 0]

I'm not sure, but I think you can also do something like this:

var aVariable;function firstFunc() {	 aVariable = oneValue;}function getVariable() {	 trace(aVariable);}

I don't have Flash right now to test this, but I'm guessing it should work (it works in plain ol' Javascript, so I don't forsee a problem - it's nothing special to Flash, merely programming semantics). Setting the variable as a member of "_root" is OK, but not necessarily that "correct" programatically, and I think that this method is better.

[demolaynyc 0]

LOL. Wow, looking back to this it just shows how much of a novice I was at AS and this was pretty recent. Yep, your code should work. The best method is yours (declaring the variable outside the functions.

[Quatrux 4]

Another solution would be to use a Class for those kind of things, usually if you want other variables work in other function, you create a Class, so the basic example is:

class MyClass {	var $var1 = '';	function myFunction1() { $this->var1 = 'Value'; }		function myFunction2() { return $this->var1; }}$MyClass = new MyClass;echo $MyClass->myFunction2(); // Value

So you can access and manage all the variables using $this->var1; In fact, sometimes using a Class is very comfortable, to play with functions
Edited March 24, 2007 by Quatrux (see edit history)

[demolaynyc 0]

Hey Quatrux, is that Actionscript or PHP? It looks to me like PHP. Well, it can be converted to AS easily anyway. wait, I noticed here: " $MyClass = new Database "why would you make a new "Database" rather than "MyClass"? JW

[lonelym 0]

Use the _root.NAMEOFVARIABLE so that you can grab it later on. Hope it helps.function myFunction1() { _root.this = 'Value'; }