# Map Functions

Map Functions is an actively used design pattern.

?Years Old |

- Map Functions ranks in the top 50% of entities I track
- the Map Functions wikipedia page
- I have 10 facts about Map Functions. what would you like to know? email me and let me know how I can help.

Languages **with** Map Functions include haskell, javascript

### Example from haskell:

class Functor f where fmap :: (a -> b) -> f a -> f b (<$) :: a -> f b -> f a

### Example from javascript:

[1,2.1].map(Math.round)

Last updated September 6th, 2019