Messing Around With roblox debug.setupvalue
If you've spent any significant amount of time digging through the more technical side of Luau, you've probably run into roblox debug.setupvalue and wondered what the big deal is. It's one of those functions that sounds way more intimidating than it actually is, but once you figure out how it works, it feels like you've unlocked a bit of a superpower. Essentially, it allows you to reach inside a function and swap out its "upvalues"—those local variables defined outside the function's immediate scope—for something else. ...