Haskell Language

What’s inside

• Foundations — GHCup and the REPL, functions and currying, types and inference, pattern matching and guards, lists and comprehensions, recursion, and higher-order functions and composition
• The Type System — Custom types, records and newtype, type classes and deriving, algebraic data types, and Maybe and Either
• The Abstraction Ladder — The three chapters that unlock the language: Functors, Applicatives, and Monads
• The Real World — The IO monad and purity, laziness and infinite structures, modules and the Prelude, and exceptions with bracket
• Advanced Crafts — Parser combinators, concurrency with forkIO, MVar and STM, and performance and strictness
• The Ecosystem — The libraries that matter in practice: aeson, QuickCheck, and optparse-applicative
• Runnable code, trap-annotated — the idiomatic way and the classic traps met in safety first, with a practice challenge and a harder bonus in every chapter
• 3 Capstone Projects — a CLI Task Manager, a Maze Solver, and a Mini Interpreter, each with a full Solutions & Explanations chapter