bs-list

bs-list

Bucklescript bindings to funkia/list

Currently compiles to function-application-style in javascript.

Install

npm i -s bs-list

add bs-list to bs-dependencies in bsconfig.json

Sample Usage

let () = 
  let open Flist in 
  lst [|1;2;3|]
  |> map ~f:(fun x -> x + 1)
  |> adjust 2 ~f:(fun x -> x * 2)
  |> foldl ~f:(fun x acc -> x * acc) 0
  |> Js.log

Please look at list's docs for all the available functions.

Why

In an ideal scenario, we should be able to write code using OCaml's 'a list type in the usual way,using recursion and pattern matching, and then make bsc compile it down to whatever representation we want 'a list to have in Javascript. In a way we are mapping idiomatic OCaml's 'a list api to whatever is our preffered/efficient js representation.

Unfortunately, bsc doesn't let us do that at the moment, it has it's own representation of 'a list which is a two element array of [head, tail] where tail is another array, with empty list being 0. It's not efficient, but you get to use pattern matching. The other option is to use Js.Array, but the api is lacking, doesn't have any of the nice things 'a list has.

Using funkia/list is a compromise, it has a pretty comprehensive api like 'a list but can't use pattern matching, is very efficient like Js.Array but has a nicer api.