How to chain multiple functions?

Question

I'm trying to chain a few functions in Clojure:

(f4 (f3 (f2 (f1 foo))))

Is there any convenient syntax sugar for this? Something like:

(with-all-of-them foo f1 f2 f3 f4)

Answer 1

Use -> macro.

(-> foo f1 f2 f3 f4)

Or reduce:

(reduce #(%2 %1) foo [f1 f2 f3 f4])

Answer 2

There is a threading macro ->:

(-> foo f1 f2 f3 f4)

Answer 3

Actually your description of with-all-of-them is very close to comp, except that comp returns a function that you must call yourself:

(f4 (f3 (f2 (f1 foo)))) == ((comp f4 f3 f2 f1) foo)

So, with-all-of-them could be implemented as follows:

(defn with-all-of-them [arg & fs]
   ((apply comp fs) arg))