Comparison With JavaScript

Literals

JS	JSJS
3	3
3.1415	3.1415
"Hello World!"	"Hello World!"
'Hello world!'	Cannot use single quotes for strings
true	true
[1,2,3]	[1,2,3]
{ "foo" : "1", "bar" : "2" }	{ "foo" : "1", "bar" : "2" }

Strings

JS	JSJS
'abc' + '123'	"abc" ^ "123"
'abc'.length	String.length("abc")

Maps

JS	JSJS
x["foo"] = "1";	Map.set(map, "foo", "1");
x["bar"] = "2";	Map.set(map, "bar", "2");

Functions

JS	JSJS
function(x,y) { return x + y; }	/\(x : num, y : num) : num => x+y;
List.map(function(x) { return x*x; }, [1, 2, 3, 4]);	List.map((/\(x : num) : num => x * x ), [1, 2, 3, 4]);
Math.max(3, 4)	Math.max(3, 4)
var filter = function(f, xs) { ... }	val filter = /\(f: (num) -> bool, xs: list num): list num => { ... }

Assignments

JS	JSJS
var x = 10	val x : num = 10
var x = 'foo';	val x : string = "foo";
var x = true;	val x : bool = true;
var x = [1,2,3];	val x : list num = [1,2,3];
var x = { "foo" : "1", "bar" : "2" };	val x <string : string> = { "foo" : "1", "bar" : "2" };
var x = function(x, y) { return x+y; }	val sq : (num) -> num = /\(x) => x+y;

Control Flow

JS	JSJS
if(x > y) { return x; }	NA, else construct necessary
if(x > y) { return x; } else { return y; }	if(x > y) then { x; } else y;
return 42;	No return statements, since everything is expression