Functional user interfaces??

"Hendrik Boom [email protected] [ocaml_beginners]" <[email protected]>
Newsgroups gmane.comp.lang.ocaml.beginners
Message-ID <[email protected]> 
Has anyone ever investigated doing user-inteerface code in a functional style?
I don't mean strictly side-effect-free coding (like Haskell), but an 
applicative style for composing the various UI components, leaving them 
to talk among themselves in the usual imperative manner?

I suspect the answer is 'yes' but I'd like to hear of any specifics.

-- hendrik
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