But wouldn't that be even more support for not bothering with user-written-left-hand in the first place?
If it just concatenated the existing lists firsts, and then enumerated the result, that issue wouldn't appear?
But wouldn't that be even more support for not bothering with user-written- left-hand in the first place?
If it just concatenated the existing lists firsts, and then enumerated the result, that issue wouldn't appear?