Modules

Modules

1. Collection of related functions, types or typeclasses

   • An application is a main module that loads up other modules an use there functions
     • You can import a module partially so you don't need to load all the functions inside a module
       • To import module: import <module>
         • Data.List
           • This module provides functions for deal with Lists and it doesn't have to be import via qualified
             • Offers functions as: intersperse, intercalte, transpose, concat, concatMap, and, or, any, all, iterate, splitAt, takeWhile. dropWhile, span sort, inits, tails, isInfixOf, isPrefixOf, isSuffixOf, elem, notElem, partition, findIndex, lines, unlines, words, unwords, nub, delete, union, intersect, insert.
               • If want to review the functionality of each of this functions please visit the link : http://learnyouahaskell.com/modules#data-list
         • Data.Char
           • This module exports functions that deal with characters. This module is helpful to "filter" and "map" over strings because the naturality of strings as lists of characters
             • This module offers some functions that act like predicates that tell us if an assumption is True or False about a character
               • Predicates or functions: isControl, isSpace, isLower, isUpperm isAlpha, isAlphaNum, isPrint, isDigit, isOctDigit, isHexDigit, isLetter, isMark, isNumber, isPunctuation, isSymbol, isSeparator, isAscii, isLatin1, isAasciiUpper, isAsciiLower
                 • Other functions: toUpper, toLower, toTitle, digitToInt, intToDigit
                   • If want to review the functionality of each of this functions please visit the link: http://learnyouahaskell.com/modules#data-char
         • Data.Map
           • Association lists, or called "dictionaries" designed to store key-value pairs where ordering doesn't matter.
             • As we have a list of pairs the first component of the pair is the "key" and the second component is the "value"
               • This module offers functions to deal with this structure called Map as: fromList, empty, insert, null, size, singleton, lookup, member, map, filter, keys, elems, fromListWith, insertWith
                 • If want to review the functionality of each of this functions please visit the link: http://learnyouahaskell.com/modules#data-map
         • Data.Set
           • Sets are like a cross between lists and maps where all the elements are unique and ordered because they are internally implemented with Trees.
             • Some actions as check the membership, inserting and deleting are much faster than in lists and this module has to be imported as "qualified"
               • Some of the functions offered to work with sets are: fromList, difference, intersection, union, null, size, member, empty, singleton, insert, delete, map, filter, toList,
     • Making our own modules
       • Example: "import Geometry"
         • Example we write the module Sphere derived from Geometry:
           • We can import some other modules:

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