[Haskell-cafe] flip1 through flip9, useful?
michael at orlitzky.com
Tue Jan 14 22:25:21 UTC 2014
On 01/14/2014 01:06 AM, Ivan Lazar Miljenovic wrote:
> On 14 January 2014 16:48, Christian Marie <christian at ponies.io> wrote:
>> I have defined a bunch of functions like this:
>> -- | Move the fourth argument to the first place
>> rotate4 :: (a -> b -> c -> d -> e) -> (d -> a -> b -> c -> e)
>> -- | Reverse four arguments
>> flip4 :: (a -> b -> c -> d -> e) -> (d -> c -> b -> a -> e)
>> I decided to upload this as a library to hackage, as I personally find it
>> useful, especially for writing FFI bindings.
>> It seems like I can't be the first to write a library like this though, am I
>> missing something obvious? Is this useful or stupid? Does it exist already?
>> Full definition here:
> Except for completeness, I don't see the point of rotate1 and flip1.
It could be nice if you're attempting something insane with e.g.
template haskell and don't want n=1 to be a special case.
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