On Sat, Jun 19, 2010 at 4:10 PM, Michał Marczyk
<[email protected]> wrote:
> (defn fact [n]
> (loop [n n r 1]
> (if (zero? n)
> r
> (recur (dec n) (* r n)))))
Huh? That doesn't look like it's going to work at all.
1) 1 is primitive, we know that, accept it
2) we don't know the type of n, what will (* r n) be?
3) BOOM!
My suggestion is to stop it with the contrived examples. Start showing some
real code, real problems in your real programs. Using loop/recur is already
the beginning of code smell for anything that is not performance sensitive.
(defn fact
([n] (fact n 1))
([n r] (if (zero? n)
r
(recur (dec n) (* r n)))))
Sleep soundly.
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