How do you avoid creating 16 callback functions for an array of 16 buttons?

[elanhickler]

Let's say I have 16 buttons in an array for an arpeggiator. I want button 0 to turn on/off step 0. I want button 1 to turn on/off step 1. How do you do that without doing:

switch(control)
{
    case(ButtonArray[0]): 
        setStepOnOff[0] = value;
        break;
    case(ButtonArray[1]): 
        setStepOnOff[1] = value;
        break;
    case(ButtonArray[2]): 
        setStepOnOff[2] = value;
        break;

etc...

}

[d.healey]

I do it with a loop that goes through each index in the array

[elanhickler]

...that loop would have to happen for every control movement, not good.

[Christoph Hart]

local i = ButtonRow.indexOf(control);
setStepOnOff[i] = value;

[d.healey]

Not every control, you can do a check to see if the control is in the array before looping, which now that I think of it would give you the array index of the control so you wouldn't need a loop after all.

I just realised that's what Christoph has suggested.