4 ms·

The Elixir |> (pipeline / nose) operator. Makes functional programming much cleaner without brackets or intermediate variables. I wish more programming language

• arrow7000 4y ago
  F# has this too (maybe had it first? I don't know) and it's wonderful. So does Elm.
• throwamon 4y ago
  This is common in the functional paradigm, although syntax and semantics varies in sometimes important ways among languages. There's a long-standing TC39 proposal to add it to JS. It's interesting to read it to see examples of the aforementioned differences. https://github.com/tc39/proposal-pipeline-operator https://github.com/tc39/proposal-pipeline-operator
• sixstringtheory 4y ago
  The Kickstarter iOS Swift code also used this, from what I remember. It was my first time ever seeing something like it, so I was also mindblown.
• null_driver 4y ago
  Ocaml also has `@@` which gives `'a -> ('a -> 'b) -> 'b = <fun>` and `|>` for `('a -> 'b) -> 'a -> 'b = <fun>` so you can also do: ```ocaml type point = { x: float; y: float};; let euclidean a a' = let xd = (a'.x -. a.x) in let yd = (a'.y -. a.y) in sqrt ((xd*.xd) +. (yd*.yd)) ;; let is_in_unit_circle x = x <= 1. let quadsolve iterations hits = ((4. *. hits) /. Float.of_int iterations) let estimate iters = let origin = { x = 0.; y = 0. } in Array.init iters (fun _ -> { x = (Random.float 1.); y = (Random.float 1.) }) |> Array.map (euclidean origin) |> Array.map is_in_unit_circle |> Array.fold_left (fun x y -> if y then x +. 1. else x ) 0. |> quadsolve iters ;; ``` utop # estimate 1000000;; - : float = 3.141432 Edit: formatting
  • unsafecast 4y ago
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