[Haskell-cafe] Pattern guards in comprehensions

[M Farkas-Dyck]

On 09/08/2015 at 22:53:01 -0400, Richard Eisenberg wrote:
> This can be done today:
> 
> > allMinus m ns = [ n' | n <- ns, Just n' <- [n -? m] ]

Ah, obviously. Please excuse my earlier stupidity.