code: function decode(str) {
    var decoded = 0;
  
    for (i = 0; i < str.length; i++) {
      decoded = decoded * length + map[str.charAt(i)];
    }
  
    return decoded;
  }
docs: Return the integer value specified by the given string.
  
  @param {String} str The string to convert.
  @returns {Number} The integer value represented by the string.
  @api public