Question

How do I convert the string option data type to string in Ocaml?

let function1 data = 
  match data with
   None -> ""
   | Some str -> str 

Is my implementation error free? Here ‘data’ has a value of type string option.

Answer 1

To answer your question, yes.

For this simple function, you can easily find it in Option module. For example, Option.default totally fits your purpose:

let get_string data = 
    Option.default "" data

There are many other useful functions for working with option types in that module, you should check them out to avoid redefine unnecessary functions.