[Haskell-beginners] Applying a function to two lists

[Matt Williams]

Thanks a lot for this.

Just to clarify (and ignoring the flip, which I can solve by rewriting the
checkNum function) - is this an example of currying?

M

On Fri, 22 Apr 2016 22:30 Francesco Ariis, <fa-ml at ariis.it> wrote:

> On Fri, Apr 22, 2016 at 10:20:19PM +0100, Matt Williams wrote:
> > I am looking for something like:
> >
> > list1 = [1,2,3,4,5,6]
> > list2 = [1,2,3,4,5,6]
> >
> > map checkNum list1 list2
> >
> > to return:
> >
> > [(1,[1]),(2[3,4,5]),(6,[3])
> >
> > (I have tried to simplify this a little, so my apologies if it looks
> > pointless - the real function is useful)
> >
> > Any help would be appreciated.
> >
> > Matt
>
> Hey Matt,
>     if what you want is
>
>     [checkNum 1 list2, checkNum 2 list2, etc.]
>
> then
>
>     map (flip checknum list2) list1
>
> is what you want (flip signature being :: (a -> b -> c) -> b -> a -> c)
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