-> and --> are macros in clojure.core, both

(-> one #(two % "a") three)
(->> one #(two "a" %) three)

expands to

(three #(two one "a"))

and (->> one #(two %1 %2) three)

expands to
(three #(two "a" one))



On Wed, Jan 12, 2011 at 10:40 PM, Sean Allen <s...@monkeysnatchbanana.com>wrote:

> So i've used this because I picked it up from numerous tutorials but I've
> never really understood it,
> can I get a some decent background information on ->> and ->?
>
> I picked them up from compojure tutorials and don't feel anywhere near
> comfortable enough w/
> what is actually going on.
>
> Thanks.
>
> -Sean-
>
>
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