Revision as of 15:37, 10 November 2006 edit Dreftymac (talk \| contribs) Extended confirmed users 8,939 edits m →Haskell's Functor class: typo ← Previous edit		Revision as of 15:38, 10 November 2006 edit undo Dreftymac (talk \| contribs) Extended confirmed users 8,939 edits m →Haskell's Functor class Next edit →
Line 21: In the [[Haskell programming language]], map is generalized to a [[Type polymorphism\|polymorphic]] function called fmap using the Functor [[type class]]. For every Functor instance, fmap must be defined such that it obeys the Functor laws: * <code>fmap id = id (identity) * <code>fmap (f . g) = fmap f . fmap g (composition)</code> [[Category:Functional programming]]

Map (higher-order function): Difference between revisions