Select a function efficiently

// pageNumber ranges from 1-8, inclusive
function displayPage(pageNumber, dc) {
    var pageHandlers = [
        screen1,
        screen2,
        screen3,
        screen4,
        screen5,
        screen6,
        screen7,
        screen8
    ];
    pageHandlers[pageNumber - 1](dc);
}

Thanks for the suggestion, I had tried something like this before which didn't work but also this implementation doesn't seem to work... I copied the exact setup and replaced the function names but it gives the following error.

Sorry, my bad. Here's a corrected example - it assumes that displayPage() and your page handlers are methods in the same class.

// pageNumber ranges from 1-8, inclusive
function displayPage(pageNumber, dc) {
    var pageHandlers = [
        :screen1,
        :screen2,
        :screen3,
        :screen4,
        :screen5,
        :screen6,
        :screen7,
        :screen8
    ];
    method(pageHandlers[pageNumber - 1]).invoke(dc);
}

If you need to refer to a method in another class, use:

new Lang.Method(OtherClass, :method_name)

e.g. in this specific case:

new Lang.Method(OtherClass, pageHandlers[pageNumber - 1]).invoke(dc);

This works beautifully indeed! Thanks a lot, and for the additional tip on the other Class.

How much code+data size dud you spare by changing the switch (if-s) to array?

Is there a way I can check that? Happy to do so if you let me know how...

When you run in the simulator: File > View Memory, and there look at the numbers for Code, Data

Application Code -120 with the pageHandler. Data stayed the same

Ok that sounds good. There's one more thing you can check if you want to be on the safe side: the total amount of used memory. In the same window in the top left corner. You need to make sure you compare it after the array is created and compare it when the "state machine" if your app is in the same state