Learn HASKELL with Real Code Examples

Updated Nov 18, 2025

Introduction & Fundamentals Setup & Configuration Architecture & Deep Internals Performance & Security Development Workflow Learning & Career Growth Business & Strategy Examples

Practical Examples

Functional utilities

Basic web server

Concurrent pipeline

Parser combinator

Compiler-style transformations

Troubleshooting

Resolve type mismatches

Fix lazy evaluation performance issues

Handle monad stack confusion

Resolve Cabal/Stack conflicts

Testing Guide

Hspec for unit testing

QuickCheck for property testing

Test monadic code with mocks

Benchmark using Criterion

Deployment Options

Compile to native binary

Docker containers

Cloud VMs

Kubernetes

Serverless via custom runtimes

Tools Ecosystem

GHC compiler

Cabal & Stack

Haskell Language Server

Servant, Yesod, Scotty

Conduit, STM libraries

Integrations

Databases via Persistent/Beam

Cloud APIs

Kafka/RabbitMQ

Web services

Blockchain frameworks

Productivity Tips

Start in ghci REPL

Use pure functions first

Add types early

Profile laziness

Challenges

Write a parser

Build a simple compiler

Create a concurrency system with STM

Build a Servant API