
30 Jul
2015
30 Jul
'15
9:38 a.m.
The first Google result: https://hackage.haskell.org/package/base-4.8.1.0/docs/Data-Ord.html It says right there that you need to define (at least) either "compare" or "<=", and that there's no "ord" function. Best regards, Marcin Mrotek