Re: [Caml-list] Create Array of floats from string

[Jon Kleiser <jon.kleiser@ceres.no>]

Thanks, Alain, maybe String.split_on_char is faster than Str.split (Str.regexp " "), but one has to be aware of that while

# #load "str.cma";;
# Str.split (Str.regexp " ") " a b c ";;
- : string list = ["a"; "b"; "c"]

then

# String.split_on_char ' ' " a b c ";;
- : string list = [""; "a"; "b"; "c"; ""]

I my case the lines in the input file ends with a space, so I will have to adjust my code to ignore that.

/Jon

> On 26. Apr, 2017, at 17:27, Alain Frisch <alain.frisch@lexifi.com> wrote:
> 
> On 26/04/2017 12:48, Jon Kleiser wrote:
>> let make_vector vec_strings =
>>  let vec = Array.make !dims 0.0 in
>>  List.iteri (fun i str -> vec.(i) <- float_of_string str) vec_strings
>> 
>> let process_line line =
>>  let parts = Str.split (Str.regexp " ") line in
>>  make_vector (List.tl parts)	(* skipping first element which is not a float *)
> 
> Since OCaml 4.04, you have:
> 
>  let parts = String.split_on_char ' ' line in
> 
> -- Alain