code: function getNumMatches(fileList, queryExpr) {
      var i,
          matches = 0;
      for (i = 0; i < fileList.length; i++) {
          var temp = countNumMatches(getFileContentsForFile(fileList[i]), queryExpr);
          if (temp) {
              numFiles++;
              matches += temp;
          }
          if (matches > MAX_TOTAL_RESULTS) {
              exceedsMaximum = true;
              break;
          }
      }
      return matches;
  }
docs: Get the total number of matches from all the files in fileList
  @param   {array} fileList  file path array
  @param   {Object} queryExpr
  @return {Number} total number of matches