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OCaml·OCaml essentials

Modules and functions

Modules group types and functions; functors parameterise modules.

Advanced 10 min read Lesson 4 of 150 Challenge included
What you will be able to do
  • Define with module M = struct ... end.
  • Use List.map and List.filter.
  • Use dune for builds.

In plain English

Modules group types and functions; functors parameterise modules.

  • Define with module M = struct ... end.
  • Use List.map and List.filter.
  • Use dune for builds.
modules.mlOCAML
module Lessons = struct
  let long values = List.filter (fun n -> n >= 15) values
end

let () = List.iter (Printf.printf "%d ") (Lessons.long [12; 18])
Your turn

Explain it back

Easy

Answer from memory: Which keyword starts a module definition?

TEXT · starter
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Knowledge checkQuestion 1

Which keyword starts a module definition?

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Lesson 4 of 150 · 0% of course