Re: Proposal: Add `maxOn` and `minOn` functions to Data.Ord

Daniel Díaz Casanueva writes:

I think these are useful in general, and that they would make a good addition to `Data.Ord`. The names are inspired by `sortOn`. Definitions:

``` minOn :: Ord b => (a -> b) -> a -> a -> a minOn f x y = case comparing f x y of LT -> x _ -> y

Bad name; it’s too close to on min, which has the same type. -- Jón Fairbairn Jon.Fairbairn@cl.cam.ac.uk