infinite stream fibonacci generator

generator.js

/*
Fibonacci infinite stream generator. Not hugely exciting yet
*/
var fgen = (function() {
  var fn1 = 0, fn2 = 1;
  f = function f() {
    var curr = fn2;
    fn2 = fn1;
    fn1 = fn1 + curr;
    return fn1;
  };
  f.reset = function() {
    fn1 = 0;
    fn2 = 1;
  }
  return f;
}());

function Generator(fn) {
  this.next = fn;
  this.reset = fn.reset || function(){};
}

var g = new Generator(fgen);
g.next(); // => 1
g.next(); // => 1
g.next(); // => 2
g.next(); // => 3
g.next(); // => 5
g.next(); // => 8
g.next(); // => 13
g.reset();
g.next(); // => 1
g.next(); // => 1
g.next(); // => 2
// etc. =>

range.js

//not a generator; 

function r(from, to) {
  var f = from, t = to, a = [];
  if (typeof t === "undefined") {
    t = f;
    f = 1;
  }
  if (t < f) {
    throw new RangeError("c'mon man");
  }
  while(f <= t) {
    a.push(f++);
  }
  return a;
}

function range(from) {
  return function(to) {
    return from > to ? [] : cons(from, range(from+1)(to));
  }
}

function range(from, to) { 
  return from > to ? [] : [from].concat(range(from+1, to)); 
}