mirror of
https://github.com/renbaoshuo/S2OJ.git
synced 2024-11-14 23:08:41 +00:00
180 lines
4.3 KiB
HTML
180 lines
4.3 KiB
HTML
|
<!doctype html>
|
||
|
|
|
||
|
|
<title>CodeMirror: ML-like mode</title>
|
||
|
|
<meta charset="utf-8"/>
|
||
|
|
<link rel=stylesheet href="../../doc/docs.css">
|
||
|
|
|
||
|
|
<link rel=stylesheet href=../../lib/codemirror.css>
|
||
|
|
<script src=../../lib/codemirror.js></script>
|
||
|
|
<script src=../../addon/edit/matchbrackets.js></script>
|
||
|
|
<script src=mllike.js></script>
|
||
|
|
<style type=text/css>
|
||
|
|
.CodeMirror {border-top: 1px solid black; border-bottom: 1px solid black;}
|
||
|
|
</style>
|
||
|
|
<div id=nav>
|
||
|
|
<a href="http://codemirror.net"><img id=logo src="../../doc/logo.png"></a>
|
||
|
|
|
||
|
|
<ul>
|
||
|
|
<li><a href="../../index.html">Home</a>
|
||
|
|
<li><a href="../../doc/manual.html">Manual</a>
|
||
|
|
<li><a href="https://github.com/marijnh/codemirror">Code</a>
|
||
|
|
</ul>
|
||
|
|
<ul>
|
||
|
|
<li><a href="../index.html">Language modes</a>
|
||
|
|
<li><a class=active href="#">ML-like</a>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<article>
|
||
|
|
<h2>OCaml mode</h2>
|
||
|
|
|
||
|
|
|
||
|
|
<textarea id="ocamlCode">
|
||
|
|
(* Summing a list of integers *)
|
||
|
|
let rec sum xs =
|
||
|
|
match xs with
|
||
|
|
| [] -> 0
|
||
|
|
| x :: xs' -> x + sum xs'
|
||
|
|
|
||
|
|
(* Quicksort *)
|
||
|
|
let rec qsort = function
|
||
|
|
| [] -> []
|
||
|
|
| pivot :: rest ->
|
||
|
|
let is_less x = x < pivot in
|
||
|
|
let left, right = List.partition is_less rest in
|
||
|
|
qsort left @ [pivot] @ qsort right
|
||
|
|
|
||
|
|
(* Fibonacci Sequence *)
|
||
|
|
let rec fib_aux n a b =
|
||
|
|
match n with
|
||
|
|
| 0 -> a
|
||
|
|
| _ -> fib_aux (n - 1) (a + b) a
|
||
|
|
let fib n = fib_aux n 0 1
|
||
|
|
|
||
|
|
(* Birthday paradox *)
|
||
|
|
let year_size = 365.
|
||
|
|
|
||
|
|
let rec birthday_paradox prob people =
|
||
|
|
let prob' = (year_size -. float people) /. year_size *. prob in
|
||
|
|
if prob' < 0.5 then
|
||
|
|
Printf.printf "answer = %d\n" (people+1)
|
||
|
|
else
|
||
|
|
birthday_paradox prob' (people+1) ;;
|
||
|
|
|
||
|
|
birthday_paradox 1.0 1
|
||
|
|
|
||
|
|
(* Church numerals *)
|
||
|
|
let zero f x = x
|
||
|
|
let succ n f x = f (n f x)
|
||
|
|
let one = succ zero
|
||
|
|
let two = succ (succ zero)
|
||
|
|
let add n1 n2 f x = n1 f (n2 f x)
|
||
|
|
let to_string n = n (fun k -> "S" ^ k) "0"
|
||
|
|
let _ = to_string (add (succ two) two)
|
||
|
|
|
||
|
|
(* Elementary functions *)
|
||
|
|
let square x = x * x;;
|
||
|
|
let rec fact x =
|
||
|
|
if x <= 1 then 1 else x * fact (x - 1);;
|
||
|
|
|
||
|
|
(* Automatic memory management *)
|
||
|
|
let l = 1 :: 2 :: 3 :: [];;
|
||
|
|
[1; 2; 3];;
|
||
|
|
5 :: l;;
|
||
|
|
|
||
|
|
(* Polymorphism: sorting lists *)
|
||
|
|
let rec sort = function
|
||
|
|
| [] -> []
|
||
|
|
| x :: l -> insert x (sort l)
|
||
|
|
|
||
|
|
and insert elem = function
|
||
|
|
| [] -> [elem]
|
||
|
|
| x :: l ->
|
||
|
|
if elem < x then elem :: x :: l else x :: insert elem l;;
|
||
|
|
|
||
|
|
(* Imperative features *)
|
||
|
|
let add_polynom p1 p2 =
|
||
|
|
let n1 = Array.length p1
|
||
|
|
and n2 = Array.length p2 in
|
||
|
|
let result = Array.create (max n1 n2) 0 in
|
||
|
|
for i = 0 to n1 - 1 do result.(i) <- p1.(i) done;
|
||
|
|
for i = 0 to n2 - 1 do result.(i) <- result.(i) + p2.(i) done;
|
||
|
|
result;;
|
||
|
|
add_polynom [| 1; 2 |] [| 1; 2; 3 |];;
|
||
|
|
|
||
|
|
(* We may redefine fact using a reference cell and a for loop *)
|
||
|
|
let fact n =
|
||
|
|
let result = ref 1 in
|
||
|
|
for i = 2 to n do
|
||
|
|
result := i * !result
|
||
|
|
done;
|
||
|
|
!result;;
|
||
|
|
fact 5;;
|
||
|
|
|
||
|
|
(* Triangle (graphics) *)
|
||
|
|
let () =
|
||
|
|
ignore( Glut.init Sys.argv );
|
||
|
|
Glut.initDisplayMode ~double_buffer:true ();
|
||
|
|
ignore (Glut.createWindow ~title:"OpenGL Demo");
|
||
|
|
let angle t = 10. *. t *. t in
|
||
|
|
let render () =
|
||
|
|
GlClear.clear [ `color ];
|
||
|
|
GlMat.load_identity ();
|
||
|
|
GlMat.rotate ~angle: (angle (Sys.time ())) ~z:1. ();
|
||
|
|
GlDraw.begins `triangles;
|
||
|
|
List.iter GlDraw.vertex2 [-1., -1.; 0., 1.; 1., -1.];
|
||
|
|
GlDraw.ends ();
|
||
|
|
Glut.swapBuffers () in
|
||
|
|
GlMat.mode `modelview;
|
||
|
|
Glut.displayFunc ~cb:render;
|
||
|
|
Glut.idleFunc ~cb:(Some Glut.postRedisplay);
|
||
|
|
Glut.mainLoop ()
|
||
|
|
|
||
|
|
(* A Hundred Lines of Caml - http://caml.inria.fr/about/taste.en.html *)
|
||
|
|
(* OCaml page on Wikipedia - http://en.wikipedia.org/wiki/OCaml *)
|
||
|
|
</textarea>
|
||
|
|
|
||
|
|
<h2>F# mode</h2>
|
||
|
|
<textarea id="fsharpCode">
|
||
|
|
module CodeMirror.FSharp
|
||
|
|
|
||
|
|
let rec fib = function
|
||
|
|
| 0 -> 0
|
||
|
|
| 1 -> 1
|
||
|
|
| n -> fib (n - 1) + fib (n - 2)
|
||
|
|
|
||
|
|
type Point =
|
||
|
|
{
|
||
|
|
x : int
|
||
|
|
y : int
|
||
|
|
}
|
||
|
|
|
||
|
|
type Color =
|
||
|
|
| Red
|
||
|
|
| Green
|
||
|
|
| Blue
|
||
|
|
|
||
|
|
[0 .. 10]
|
||
|
|
|> List.map ((+) 2)
|
||
|
|
|> List.fold (fun x y -> x + y) 0
|
||
|
|
|> printf "%i"
|
||
|
|
</textarea>
|
||
|
|
|
||
|
|
|
||
|
|
<script>
|
||
|
|
var ocamlEditor = CodeMirror.fromTextArea(document.getElementById('ocamlCode'), {
|
||
|
|
mode: 'text/x-ocaml',
|
||
|
|
lineNumbers: true,
|
||
|
|
matchBrackets: true
|
||
|
|
});
|
||
|
|
|
||
|
|
var fsharpEditor = CodeMirror.fromTextArea(document.getElementById('fsharpCode'), {
|
||
|
|
mode: 'text/x-fsharp',
|
||
|
|
lineNumbers: true,
|
||
|
|
matchBrackets: true
|
||
|
|
});
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<p><strong>MIME types defined:</strong> <code>text/x-ocaml</code> (OCaml) and <code>text/x-fsharp</code> (F#).</p>
|
||
|
|
</article>
|