On Sun, Aug 14, 2011 at 6:08 AM, Mats Rauhala <[email protected]> wrote:
> Another function in the same way is 'const :: a -> b -> a' (on haskell,
> but easy to make in clojure if it doesn't exist) which
> disregards the second argument and always returns the first.
The functions returned by "constantly" in Clojure do something
similar. They accept any arity but return a constant value:
(defn constantly
"Returns a function that takes any number of arguments and returns x."
{:added "1.0"
:static true}
[x] (fn [& args] x))
It's not hard to make an exact copy of the Haskell behavior in Clojure:
(defn firstarg [x & args]
x)
(constantly x) then is expressible as (partial firstarg x). :)
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