// attempt to make a swift-style generic memoize idiom ( https://gist.github.com/berkus/8a9e104f8aac5d025eb5 )
function memoize(body) {
  var memo = {};
  return function memo_op(param) {
    if (memo[param] === undefined)
      memo[param] = body(memo_op, param);
    return memo[param];
  }
}

var fibonacci = memoize(function (fibonacci, n) {
  return (n < 2 ? n : fibonacci(n-1) + fibonacci(n-2));
});

console.log(fibonacci(45) / fibonacci(44));