ArrayPointer

Function type for accessing and manipulating arrays by reference.

This type definition allows passing arrays between UI elements and field systems in a functional way, where the array can be both read and written.

Usage example:

var myArray = [1, 2, 3];
var pointer:ArrayPointer = (val, erase) -> {
    if (erase) myArray = [];
    else if (val != null) myArray = val;
    return myArray;
};

// Read current value
var current = pointer();

// Set new value
pointer([4, 5, 6]);

// Clear array
pointer(null, true);