1 var comb = exports;
  2 
  3 /**
  4  * Determines if obj is a number
  5  *
  6  * @param {Anything} obj the thing to test if it is a Number
  7  *
  8  * @returns {Boolean} true if it is a number false otherwise
  9  */
 10 comb.isNumber = function(obj) {
 11     var undef;
 12     return obj !== undef && obj != null && (typeof obj == "number" || obj instanceof Number);
 13 };
 14 
 15 /**
 16  * @private
 17  */
 18 var round = Math.round, pow = Math.pow;
 19 
 20 /**
 21  * @namespace Utilities for numbers
 22  */
 23 comb.number = {
 24     /**
 25      * Rounds a number to the specified places.
 26      *
 27      *
 28      * @param {Number} num the number to round.
 29      * @param {Number} places the number of places to round to.
 30      */
 31     round : function(number, places, increment) {
 32         increment = increment || 1e-20;
 33         var factor = 10 / (10 * (increment || 10));
 34         return (Math.ceil(factor * +number) / factor).toFixed(places) * 1; // Number
 35     }
 36 };