code: function randomIntRangeWithout(a, b, c) {
      var x = Math.floor(randomRange(a, b));
      return c.indexOf(x) < 0 ? x : randomIntRangeWithout(a, b, c);
  }
docs: ## randomIntRangeWithout(a, b, c)  randomIntRangeWithout(1, 100, [50, 51])  Returns a random integer between the range, but excluding c