docs: function _gpfFromBaseANY (base, text, pad) {
      var baseLength = base.length,
          result = 0,
          idx = _gpfSkipPad(text, pad || base.charAt(0));
      while (idx < text.length) {
          result = baseLength * result + base.indexOf(text.charAt(idx++));
      }
      return result;
  }