Hello all,
How can I do something to each element of a list, but only modify one element at at time, so the result is a list of
lists, where each sublist is the original list with one element altered.
Something like
type Each a = (a->a) -> [a] -> [[a]]
I came up with:
each :: Each a
each f [] = []
each f (x:xs) = (f x : xs) : (map (x:) $ each f xs)
λ> each (*10) [1..3]
[[10,2,3],[1,20,3],[1,2,30]]
but I wonder if there is a more standard way of doing this
