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179 lines
4.3 KiB
179 lines
4.3 KiB
<!doctype html> |
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<title>CodeMirror: ML-like mode</title> |
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<meta charset="utf-8"/> |
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<link rel=stylesheet href="../../doc/docs.css"> |
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<link rel=stylesheet href=../../lib/codemirror.css> |
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<script src=../../lib/codemirror.js></script> |
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<script src=../../addon/edit/matchbrackets.js></script> |
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<script src=mllike.js></script> |
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<style type=text/css> |
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.CodeMirror {border-top: 1px solid black; border-bottom: 1px solid black;} |
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</style> |
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<div id=nav> |
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<a href="http://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></a> |
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<ul> |
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<li><a href="../../index.html">Home</a> |
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<li><a href="../../doc/manual.html">Manual</a> |
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<li><a href="https://github.com/codemirror/codemirror">Code</a> |
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</ul> |
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<ul> |
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<li><a href="../index.html">Language modes</a> |
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<li><a class=active href="#">ML-like</a> |
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</ul> |
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</div> |
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<article> |
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<h2>OCaml mode</h2> |
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<textarea id="ocamlCode"> |
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(* Summing a list of integers *) |
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let rec sum xs = |
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match xs with |
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| [] -> 0 |
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| x :: xs' -> x + sum xs' |
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(* Quicksort *) |
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let rec qsort = function |
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| [] -> [] |
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| pivot :: rest -> |
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let is_less x = x < pivot in |
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let left, right = List.partition is_less rest in |
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qsort left @ [pivot] @ qsort right |
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(* Fibonacci Sequence *) |
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let rec fib_aux n a b = |
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match n with |
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| 0 -> a |
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| _ -> fib_aux (n - 1) (a + b) a |
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let fib n = fib_aux n 0 1 |
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(* Birthday paradox *) |
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let year_size = 365. |
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let rec birthday_paradox prob people = |
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let prob' = (year_size -. float people) /. year_size *. prob in |
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if prob' < 0.5 then |
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Printf.printf "answer = %d\n" (people+1) |
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else |
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birthday_paradox prob' (people+1) ;; |
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birthday_paradox 1.0 1 |
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(* Church numerals *) |
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let zero f x = x |
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let succ n f x = f (n f x) |
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let one = succ zero |
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let two = succ (succ zero) |
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let add n1 n2 f x = n1 f (n2 f x) |
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let to_string n = n (fun k -> "S" ^ k) "0" |
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let _ = to_string (add (succ two) two) |
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(* Elementary functions *) |
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let square x = x * x;; |
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let rec fact x = |
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if x <= 1 then 1 else x * fact (x - 1);; |
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(* Automatic memory management *) |
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let l = 1 :: 2 :: 3 :: [];; |
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[1; 2; 3];; |
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5 :: l;; |
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(* Polymorphism: sorting lists *) |
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let rec sort = function |
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| [] -> [] |
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| x :: l -> insert x (sort l) |
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and insert elem = function |
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| [] -> [elem] |
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| x :: l -> |
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if elem < x then elem :: x :: l else x :: insert elem l;; |
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(* Imperative features *) |
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let add_polynom p1 p2 = |
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let n1 = Array.length p1 |
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and n2 = Array.length p2 in |
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let result = Array.create (max n1 n2) 0 in |
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for i = 0 to n1 - 1 do result.(i) <- p1.(i) done; |
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for i = 0 to n2 - 1 do result.(i) <- result.(i) + p2.(i) done; |
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result;; |
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add_polynom [| 1; 2 |] [| 1; 2; 3 |];; |
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(* We may redefine fact using a reference cell and a for loop *) |
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let fact n = |
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let result = ref 1 in |
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for i = 2 to n do |
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result := i * !result |
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done; |
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!result;; |
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fact 5;; |
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(* Triangle (graphics) *) |
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let () = |
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ignore( Glut.init Sys.argv ); |
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Glut.initDisplayMode ~double_buffer:true (); |
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ignore (Glut.createWindow ~title:"OpenGL Demo"); |
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let angle t = 10. *. t *. t in |
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let render () = |
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GlClear.clear [ `color ]; |
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GlMat.load_identity (); |
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GlMat.rotate ~angle: (angle (Sys.time ())) ~z:1. (); |
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GlDraw.begins `triangles; |
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List.iter GlDraw.vertex2 [-1., -1.; 0., 1.; 1., -1.]; |
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GlDraw.ends (); |
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Glut.swapBuffers () in |
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GlMat.mode `modelview; |
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Glut.displayFunc ~cb:render; |
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Glut.idleFunc ~cb:(Some Glut.postRedisplay); |
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Glut.mainLoop () |
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(* A Hundred Lines of Caml - http://caml.inria.fr/about/taste.en.html *) |
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(* OCaml page on Wikipedia - http://en.wikipedia.org/wiki/OCaml *) |
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</textarea> |
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<h2>F# mode</h2> |
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<textarea id="fsharpCode"> |
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module CodeMirror.FSharp |
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let rec fib = function |
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| 0 -> 0 |
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| 1 -> 1 |
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| n -> fib (n - 1) + fib (n - 2) |
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type Point = |
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{ |
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x : int |
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y : int |
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} |
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type Color = |
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| Red |
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| Green |
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| Blue |
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[0 .. 10] |
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|> List.map ((+) 2) |
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|> List.fold (fun x y -> x + y) 0 |
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|> printf "%i" |
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</textarea> |
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<script> |
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var ocamlEditor = CodeMirror.fromTextArea(document.getElementById('ocamlCode'), { |
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mode: 'text/x-ocaml', |
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lineNumbers: true, |
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matchBrackets: true |
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}); |
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var fsharpEditor = CodeMirror.fromTextArea(document.getElementById('fsharpCode'), { |
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mode: 'text/x-fsharp', |
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lineNumbers: true, |
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matchBrackets: true |
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}); |
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</script> |
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<p><strong>MIME types defined:</strong> <code>text/x-ocaml</code> (OCaml) and <code>text/x-fsharp</code> (F#).</p> |
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</article>
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