This problem is really confusing me. I found a solution online, but I
can't understand the solution. Can anyone explain to me why this
works?
The problem is stated as:
Write a function which allows you to create function compositions. The
parameter list should take a variable number of functions, and create
a function applies them from right-to-left.
(= [3 2 1] ((__ rest reverse) [1 2 3 4]))
(= 5 ((__ (partial + 3) second) [1 2 3 4]))
The examples would accept the solution replacing the ____.
The solution I found is:
(fn [x & xs]
(fn [& args]
((fn step [[f & fs] a]
(if fs
(f (step fs a))
(apply f a)))
(cons x xs) args)))
This works, and baffles me when I try to understand it.
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