[Haskell-cafe] Pattern guards in comprehensions

[Richard Eisenberg]

Apologies if my earlier message came across as a bit brutal. When I first saw this pattern a little while ago, I was surprised by it too!

Cheers,
Richard

On Aug 9, 2015, at 11:55 PM, M Farkas-Dyck <strake888 at gmail.com> wrote:

> 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.