src/util/fib.js

   1 tr.util.Fib = function () {
   2   var self = {};
   3
   4   self.sequence = function (length) {
   5     var result = [0, 1];
   6
   7     for (var i = 2; i < length; i++) {
   8       result[i] = result[i-2] + result[i-1];
   9     }
  10
  11     return result;
  12   };
  13
  14   self.sum = function (length) {
  15     if (length === 0) { return 0; }
  16     if (length === 1) { return 1; }
  17
  18     return self.sequence(length + 1).reduce(function (previous, current) {
  19       return previous + current;
  20     }, 0);
  21   };
  22
  23   return self;
  24 };