Re: [Haskell-cafe] whine and solution about programmers not respecting documentations

On Tue, Jun 29, 2010 at 11:46 AM, Ketil Malde wrote:

 deleteBy :: (a -> Bool) -> [a] -> [a]

I don't think there would be any doubt what 'deleteBy (<= 5) [1..10]' would do. And I just don't see what the requirement for an equivalence relation buys you.

Your deleteBy is (filter . not), isn't it? --Max