CoffeeScript : class variable & instance variable

main.coffee

class C
	@count = 0; # class variable
	constructor: (num) ->
		C.count += 1;
		@hoge = num; # instance variable

console.log( C.count ); # => 0
s = new C(72);
console.log( C.count ); # => 1
t = new C(64);
console.log( C.count ); # => 2

console.log( s.hoge );  # => 72
console.log( t.hoge );  # => 64