On Tue, Jul 16, 2013 at 2:16 PM, Keith Maynard <[email protected]> wrote:
> (defn perms
> ( [] [[]])
This is not pattern matching in Clojure. It defines an alternative
arity version of the function so that (perms) would return [[]].
> ([xs]
>
> (for [x xs p (perms (removeFirst x xs))] (cons x p)) )
>
> )
You need something like this:
(defn perms
[xs]
(if (seq xs)
(for [x xs p (perms (removeFirst x xs))] (cons x p))
[[]]))
--
Sean A Corfield -- (904) 302-SEAN
An Architect's View -- http://corfield.org/
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