gistfile1.txt

/**
 * Adds a leading zero to numbers less than 10
 *
 * @param {Number|String} val Numeric value
 * @param {Number} len (optional, default = 2) String length
 * @return {String} Modified value
 */
var addLeadingZero = function(val /*, len */) {
  var str = val.toString();
  var len = arguments[1] || 2;

  while (str.length < len) {
    str = '0' + str;
  }
  
  return str;
};

var addLeadingZeroes = addLeadingZero;