Hello all, Data.Ord has a handy function called comparing, and its documentation shows an example of its use. But what if you want to sort a list of values based on multiple criteria? It turns out there is a neat way to do this: compareTuple = mconcat [comparing fst, comparing snd] The default Monoid instances for Ordering and functions work exactly as required here. (Thanks to vixey in #haskell for the hint to look at monoids!) To reverse the order of a criterion or a set of criteria, flip can be used: compareTuple' = mconcat [comparing fst, flip $ comparing snd] I think it would be really neat if these two use cases were also described in comparing's documentation. Who is the right person to ask this of? Thanks in advance, Martijn.