Learn HASKELL with Real Code Examples
Updated Nov 18, 2025
Learning Path
Learn functional thinking
Master types & typeclasses
Learn monads & effects
Work with libraries & frameworks
Build real projects
Skill Improvement Plan
Week 1: Pure functions & types
Week 2: Monads & typeclasses
Week 3: I/O & concurrency
Week 4: Real-world backend
Interview Questions
What is a Monad?
Explain lazy evaluation in Haskell.
What are typeclasses?
What is the difference between Maybe and Either?
How does Haskell handle concurrency?
Cheat Sheet
Function: f x = x + 1
List: [1,2,3]
Map: map (+1) list
Monad: do-notation sequencing
Typeclass: class Eq a where ...
Books
Real World Haskell
Programming in Haskell
Haskell From First Principles
Tutorials
Learn You a Haskell
Haskell Programming from First Principles
Real World Haskell
Official Docs
Haskell Report
GHC User Guide
Haskell Wiki
Community Links
Haskell Reddit
Haskell Discourse
StackOverflow
Community Support
Haskell Reddit community
StackOverflow haskell tag
Haskell Discourse
Haskell Foundation