[Haskell-cafe] UI-state, using State Monad or IORef?

[guenni68]

Hi,

at one point I generate n elements of dropdowns dynamically. Whenever
I make a selection in any of those choices the others should also be
updated, ie. the list of available choices needs to be altered.

But I also need to update in place the "model" that is associated with
each individual dropdown.

Should I simply use IORefs for this purpose, or should I rather use a
more functional code with the State Monad?

Is there a tutorial or an example on how to use the State monad?

Günther