zlacker

You could do something like this in Clojure:

    (first (filter identity
                   [(and (condition-three) (action-three))
                    (and (condition-one) (action-one))
                    (and (condition-four) (action-four))
                    (and (condition-two) (action-two))]))

And you could write a macro to do it with nice syntax. A bit more work and you could parallelize it.

You probably wouldn't want to most of the time, but if the conditions are slow to test but otherwise inexpensive, it might be a useful optimization.