private void PrvItm_compare() {
   int prvSymLen = prvSymAry.length;
   prvSymMatch = curSymLen == prvSymLen;
   commonSymLen = 0;
   for (int i = 0; i < curSymLen; i++) {
     if (i < prvSymLen
         && (Xop_list_wkr_.Compare_normalize(curSymAry[i])
             == Xop_list_wkr_.Compare_normalize(prvSymAry[i]))) {
       commonSymLen = i + 1;
     } else {
       prvSymMatch = false;
       break;
     }
   }
 }