First, thank you to Mike and Nicole for putting this together. Extremely generous of you to spend the time, and very helpful.
In the first example (Porch Light), I noticed that the up/down buttons can exceed the expected range (negative numbers, numbers above 100). I know this isn’t the focus of the course, but what is the most idiomatic way to constrain them? Elixir wouldn’t let me use socket.assigns.brightness inside a guard clause. I eventually came up with this:
def handle_event("up", _unsigned_params, socket) do
case socket.assigns.brightness do
100 -> {:noreply, socket}
_ -> {:noreply, update(socket, :brightness, &(&1 + 10))}
end
end
def handle_event("down", _unsigned_params, socket) do
case socket.assigns.brightness do
0 -> {:noreply, socket}
_ -> {:noreply, update(socket, :brightness, &(&1 - 10))}
end
end
Is there a better way?
