How do I check the ocaml documentation when offline?

Learning
1

I want to look up what ocaml built ins etc do without internet access. Is that possible?

e.g.

I want to look yp what List.fold_left does.

I tried this but it didn’t work:

─( 10:50:13 )─< command 4 >─────────────────────────────────────────────────────────────────────────────────────────────{ counter: 0 }─
utop # List.fold_left
;;
- : ('a -> 'b -> 'a) -> 'a -> 'b list -> 'a = <fun>
─( 10:50:21 )─< command 5 >─────────────────────────────────────────────────────────────────────────────────────────────{ counter: 0 }─
utop # help List.fold_left;;
Error: Unbound value help
2

If you installed the tooling with opam it should set up manual pages. Try running man List in the command line.

3

What does that mean? Does that mean in ocaml top or in the unix bash command line?

Regardless I tried it in utop and go this:

─( 10:53:25 )─< command 8 >─────────────────────────────────────────────────────────────────────────────────────────────{ counter: 0 }─
utop # man List;;
Error: Unbound value man
4

In the Unix bash command line.

5

How do I install the tooling with opam?

6

You might already have it. Try running opam --help on the Unix bash command line. If you don’t, you can follow the instructions here: https://opam.ocaml.org/doc/Install.html

7

@yawaramin Is there any way to read docs for installed libraries/packages, like Core?

8

Sure, see https://erratique.ch/software/odig

9

Debian

Binary packages of opam are available for the stable, testing and unstable distributions, from the official repositories. You should be set with:

apt-get install opam