Dear
Haskellers,
since this is my
first post,
"Hello all"
I have a problem
with a function taken from class Arrow.
arr :: (b -> c) -> a b c
To build my own
arrow, i need to distinguish between different kinds of b or
c.
For instance, if
b has the form (d,e), i want to construct something different as when
having form (d,e,f).
Could I get a hint
how to express my needs, please!
Many thanks in
advance
Sven
Biedermann