Say you are given a vector A=[a1 a2 a3 a4] by some function/library/Java call/whatever. You want to use A in some function F that expects the values a1 a2 a3 a4 but not in the form of A; for example (defn F [w x y z] (+ w x y z)). Is there some function G that you can use on A such that (F (G A)) would give the correct answer? I now know ways of getting around this, for example in the overly simple problem I gave above I would use (eval (cons F [1 2 3 4])). But I have came across problems where I have had to spend a large amount of time trying to figure out how to do this correctly. I would think that there could be something to act as G. Is there something like this? It would definitely simplify things from time to time.
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