Not able to get a module function working

Question

I am trying this simple code to split a string to a list by a separator:

open String;;
let ss = "/usr/bin/ocaml";;
let sslist = String.split_on_char '/' ss  in
    print_endline sslist;;

It is giving error:

$ ocaml testing.ml

File "testing.ml", line 5, characters 13-33:
Error: Unbound value String.split_on_char

I am sure it is something very basic but I am not able to solve it. Removing open String or using #require "string" also does not work.

Where is the problem and how can it be solved? Thanks for your help.

What does `ocaml -version` say? `String.split_on_char` is only available since 4.04.0, as per the docs. — glennsl, May 05 '19 at 14:13
My version is `The OCaml toplevel, version 4.02.3`. So that explains. How can I split a string in my version? — rnso, May 05 '19 at 14:22
You could use `Str.split`, or something in a stdlib replacement like Base/Core, I'm sure. But you really should upgrade. 4.02.3 is pretty old, we'll soon be on 4.08 now. — glennsl, May 05 '19 at 14:30
I would recommend using opam instead to manage both your ocaml installations and third-party packages. [It's also available in the Debian repos](https://opam.ocaml.org/doc/Install.html). — glennsl, May 05 '19 at 15:02

score 1 · Accepted Answer · answered May 05 '19 at 14:36

1

String.split_on_char is only available since 4.04.0, as per the docs.

You really should upgrade, but in case you can't, refer to this question for alternatives.

answered May 05 '19 at 14:36

glennsl

1 Answers1