27 May
2007
27 May
'07
5:53 p.m.
map :: ((a -> b) -> [a]) -> [b]
I am not following here: what do you mean? Clearly, this is not a valid typing for map. Moreover, modulo undefinedness, there are no functions with this typing.
map _ = []
Ah, well, and that one, of course... :-) Cheers, Stefan