Learn OCAML with Real Code Examples
Updated Nov 20, 2025
Learning Path
Learn functional programming basics
Understand pattern matching and recursion
Explore modules and signatures
Practice functors and polymorphic variants
Build real-world projects and libraries
Skill Improvement Plan
Week 1: Functional programming fundamentals
Week 2: Pattern matching and recursion
Week 3: Modules, signatures, and functors
Week 4: Real-world projects and performance tuning
Interview Questions
Explain type inference in OCaml.
Difference between immutable and mutable data?
What are functors in OCaml?
How does pattern matching work?
Explain tail recursion and why it matters.
Cheat Sheet
let x = 10;;
let rec fact n = if n = 0 then 1 else n * fact (n-1);;
type person = {name: string; age: int};;
module M = struct let a = 10 end;;
let module F(X: SIG) = struct ... end
Books
Real World OCaml by Yaron Minsky, Anil Madhavapeddy, Jason Hickey
OCaml from the Very Beginning
More OCaml: Algorithms, Methods, and Diversions
Functional Programming in OCaml
Developing Applications with OCaml
Tutorials
Learn OCaml
OCaml for Functional Programming
OCaml Module and Functor Tutorials
Real-world OCaml projects
Advanced OCaml programming
Official Docs
OCaml Manual
OCaml Language Reference
OPAM Package Manager Documentation
Community Links
OCaml Discourse
StackOverflow OCaml tag
Reddit r/ocaml
GitHub OCaml projects
OCaml meetups and conferences
Community Support
OCaml Discourse
StackOverflow OCaml tag
Reddit r/ocaml
GitHub OCaml projects
OCaml meetups and conferences