PureScript by Example - 4.7 Filtering Arrays - Exercise 1-3 Solutions

MapAndFilter.purs

module MapAndFilter where

-- 4.7 Filtering Arrays of PureScript by Example

import Prelude
import Data.Array

-- Exercise 1
squared :: Array Number -> Array Number
squared = map (\n -> n * n)

-- Exercises 2-3
infixr 5 filter as <$?>
sansNegative :: Array Number -> Array Number
sansNegative = (<$?>) (\n -> n >= 0.0)