code: function() {
  
        var w = this['w'];
        var x = this['x'];
        var y = this['y'];
        var z = this['z'];
        var ret = '';
  
        if (isNaN(w) || isNaN(x) || isNaN(y) || isNaN(z)) {
          return 'NaN';
        }
  
        // Alternative design?
        // '(%f, [%f %f %f])'
  
        ret = numToStr(w, '', ret);
        ret += numToStr(x, 'i', ret);
        ret += numToStr(y, 'j', ret);
        ret += numToStr(z, 'k', ret);
  
        if ('' === ret)
          return '0';
  
        return ret;
      }
docs: Gets the Quaternion as a well formatted string
  
  @returns {string}