Chapter 7 - Modules

Chapter 7 - Modules

1. Loading Modules

   • Collection of
     • Functions
     • Types
     • Classes of Types
   • To load a module it is used
     • From GHCI with: ': m + <module>'
     • Desde un script hs: 'import <module>'
       • And for specific functions 'import <module> (<function>, <function>, ...)'

2. Data.List

   • Deal exclusively with lists
   • Useful functions
     • Interperse
       • Take an element and a list puts that element between each pair of elements in the list.
     • Intercalate
       • Take a list and list of lists. Insert the first list among all the other list, resulting in a single list
     • Transpose
       • Transpose a list of lists

3. Data.Char

   • Exports functions that deal with characters such as
     • isControl
     • isSpace
     • isLower
     • isUpper
     • isAlphaNum

4. Making our own modules

   • The .hs file must comply with this structure
     • module <ModuleName> (<functioName>, ...) where <structureFunction>

5. Data.Map

   • It offers us work of associacoon lists
     • are lists that are used to store key-value pairs where order does not matter
   • findKey

6. Data.Set

   • Offers operations with mathematical sets
     • The sets are a type of data mix between the list and the dictionaries