3 ms·
(Num t) => t means that the value can have the type of any member of class Num, but it can't be more than one type at a time. There are no subtypes in Haskell.
by Zaak 16y ago
(Num t) => t means that the value can have the type of any member of class Num, but it can't be more than one type at a time. There are no subtypes in Haskell.