Things you didn't know you could do in OCaml!

Did you know you could do these in OCaml?

match int_of_string n with
  | exception _ -> ...
  | _ -> ...

You can catch exceptions as if they were patterns in match expressions.

Also, remember you can locally open modules? If it’s just a line or two you could instead of, for instance

let f =
  let open List in
  init 10 Fun.id |> rev

do this

let f =
  List.(init 10 Fun.id |> rev)

It doesn’t just work this way. You can also do this with lists, arrays, and inside of records. Here’s an example using the arbitrary precision numbers module Z

[| Z.zero; Z.one |]

versus

Z.[| zero; one |]

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Cool. If you’ve got suggesions, or other interesting OCaml syntax, feel free to contact my email and I surely add them to this list.