+1. On 21.06.2015 08:32, Grant Slatton wrote:
Right now the type of deleteBy is:
(a -> a -> Bool) -> a -> [a] -> [a]
That is, it takes an equality predicate, a value, and a list, and deletes the first element in the list such that the equality predicate returns true for the given value and the element.
This can be generalized to:
(a -> b -> Bool) -> a -> [b] -> [b]
Example use case:
keyValues :: [(a, b)]
key :: a
deleteBy (\x (y, _) -> x == y) key keyValues
Thanks
Grant Slatton
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