Question

Is it possible to have a condition in a map function?

For example :

map (> 0 < 100 )[1..10]

If it’s not possible, how could one achieve this?

Answer 1

Not quite like that, I presume you are trying to get a boolean indicating whether the value is greater than 0 and less than 100? You have several options:

You can name a function

condition :: Int -> Bool
condition x = x > 0 && x < 100
map condition [1..10]

You can use a lambda

map (\x -> x > 0 && x < 100) [1..10]

You can use Data.Ix and the inRange function

import Data.Ix

-- inRange is inclusive.
map (inRange (1,99)) [1..10]