I'm trying to do something like this:

var something = "someValue";

some_btn.onPress = function (something) {
   someFunction(something);
}

function someFunction (argument) {
   trace(argument);
}

But it traces "undefined". What would be the correct way of achieving this?

• flash
• function
• actionscript-2

onPress() doesn't take arguments.

You could make your own press function like this:

Object.prototype.myPress = function(str:String):Void
{
    // Delete old onPress.
    if(this["onPress"] != undefined) delete this.onPress;

    // Add new onPress.
    this.onPress = function():Void
    {
        someFunction(str);
    }
}

With your someFunction():

function someFunction(str:String):Void
{
    trace(str);
}

And then implement like so:

some_btn.myPress("hello");

This will work:

var something = "someValue";

some_btn.onPress = function () {
   someFunction(something);
}

function someFunction (argument) {
   trace(argument);
}

Alternatively, this will also work:

var something = "someValue";

some_btn.onPress = function () {
   someFunction();
}

function someFunction () {
   trace(something);
}

This happens because you named your parameter equals the gloval variable name you've created:

var something = "someValue";
some_btn.onPress = function (something) { ...

This "creates a local variable" with the same name. Since local variables have preference and the onPress don't send any value, you got undefined.

To solve, remove the variable from the event handler as net.uk.sweet suggested:

some_btn.onPress = function () { ...