7 Apr
2017
7 Apr
'17
10:27 p.m.
On 08/04/17 11:36, Anthony Clayden wrote:
Contrast that `instance Foldable ((,) b)` appeared in GHC 7.8 ~2014, along with `instance Foldable Either`.
FWIW, both of these appeared in Functional Java in 2003 and Scalaz, in 2005. I haven't properly followed this thread, so I am unsure what questions were raised. Sorry if it was relevant to our other discussions and I have ignored it.