[Haskell-cafe] Does this function already exist in the libraries?
dagit at eecs.oregonstate.edu
Fri Sep 8 02:12:21 EDT 2006
Sometimes I find that I have two lists I want to combine, but I only
want to combine them for as much as I have elements in both lists to
combine and then the rest I just want to pass through unmodified.
I've now found the following function useful in three different
programs I've written:
zipWith' :: (a -> a -> a) -> [a] -> [a] -> [a]
zipWith' _  ys = ys
zipWith' _ xs  = xs
zipWith' f (x:xs) (y:ys) = f x y : zipWith' f xs ys
Does it already exist or maybe there is another natural solution to
use in its place?
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