Modules

Modules

1. It is a collection of functions, typeclasses and types

2. Examples of Modules

   • Data.List
     • Imports functions that works with Lists
       • Intersperce
       • Intercalate
       • Transpose
       • Concat
       • concatMap
   • Data.Char
     • Imports functions that works with Char
       • ToUpper
       • ToLower
       • digitToInt
       • IsDigit
   • Data.Map
     • Imports functions that works with Maps
       • Are lists that are used to store key-value pairs
       • insert
       • size
       • Singleton
       • Lookup
   • Data.Set
     • Imports functions that works with Sets
       • Sets are like the ones in mathematics, in Haskell is like a combination between Maps and lists
       • fromList
       • intersection
       • differences
       • Union

3. Modules can be created

   • it is necessary to specify de module name
   • In the module definition we mention the functions that will be exported
   • Implement the functions within the module
   • There are two ways to import a module
     • Normal
       • import Data.List
     • Qualified
       • import qualified Data.List as List