book

Learning Functional Programming

by Jack Widman

August 2022

Intermediate to advanced

135 pages

2h 51m

English

O'Reilly Media, Inc.

Book available

Read now

Unlock full access

Who Should Use This Book?How The Book Is OrganizedConventions Used in This BookO’Reilly Online LearningHow to Contact Us
ImmutabilityReferential TransparencyHigher Order FunctionsLazy EvaluationThinking Like a Functional ProgrammerThe Benefits of FPFP Can Improve ProductivityFP Is Fun!ScalaConclusion
Set TheoryFunctionsKinds of FunctionsComputer Science FundamentalsAnonymous FunctionsFunctions as First Class ObjectsConclusion
Category Theory–Based PatternsA Brief HistoryObjects and MorphismsAn Example of a CategoryThe Category ScalFunctorsProgramming Language Formulation of a FunctorThe PatternsThe Functor PatternMonoidsNatural TransformationsMonadsConclusion
The Option Data StructureThe Try Data StructureThe Either Data StructureHigher Order FunctionsMonads in for Comprehensions in ScalaTraditional Data StructuresImmutability and HistoryLazinessConclusion
Mutable and Immutable VariablesRecursionA Linked List ExampleTail RecursionMore Examples of the Power of fold in ScalaA Connection Between fold and MonoidsMore with Higher Order FunctionsFrom map to flatMapConclusion
StreamsAkka StreamsSourceFlowSinkMore on StreamsFS2: Functional Streams for ScalaConclusion
Taking the Pure RouteThe IO MonadTaking the Middle RouteJVM Languages.NET LanguagesType ClassesConclusion
AssumptionsOverviewvar and valClasses and ObjectsFunctionsFunctions that Return FunctionsCase ClassesDeclaring FunctionsCurryingAnonymous FunctionsHigher Order FunctionsPattern MatchingTraitsDistinguishing Abstract Classes and TraitsLazy EvaluationType ParametersThe Option TypeFutureSome Key Higher Order FunctionsSome Other Important Higher Order FunctionsConclusion

Content preview from Learning Functional Programming

About the Author

Jack Widman started his professional life as a mathematician in academia. He studied and taught the intricacies of the mathematical theory of pseudo-compact topological groups, as well as teaching calculus and discrete math courses. At the suggestion of some friends, he decided to try out programming and see if it resonated with him. It is now 24 years later, and Jack has been designing and writing code ever since. With a PhD in mathematics and 24 years of software industry experience, Jack conceived of the idea to write a book on functional programming, a subject with deep mathematical roots, and this book you have in your hands is the result. In his spare time, Jack enjoys reading, writing, and learning all about cybersecurity.