an even worse fibbonacci sequence generator

bad-fib.js

function fib(count) {
  function f(list) { if(!count) return list; x(); count--; return f(list); }
  
  function x() { 
    var list = f.arguments[0];
    list.push((list[list.length - 1] || 1) + (list[list.length - 2] || 0));
  }
  
  if (count < 0) count = 0;
  return f([]);
}

fib(5); // returns [ 1, 1, 2, 3, 5 ]