30 Dec
2014
30 Dec
'14
1:15 p.m.
On Tue, Dec 30, 2014 at 12:05 PM, Johan Tibell
We should check that `filterM . toList` isn't as fast. That was the case for bytestring and we rejected adding filterM there for that reason.
Let me expand that definition to what it really looks like: filterMSeq f = fmap fromList . filterM f . toList Yes, you can do this. Yes, it's probably even pretty efficient. But it's a bit painful to have to expand things out like this just to switch a bit of code from lists to sequences.