从数据数组中筛选出重叠数据

function findOverlappingData(dataArray) {
  var overlappingData = [];

  for (var i = 0; i < dataArray.length; i++) {
    var currentData = dataArray[i];

    for (var j = i + 1; j < dataArray.length; j++) {
      var comparedData = dataArray[j];

      // 判断重叠的条件，这里假设为数字相等
      if (currentData === comparedData) {
        overlappingData.push(currentData);
        break;
      }
    }
  }

  return overlappingData;
}

// 示例用法
var data = [1, 2, 3, 2, 4, 5, 3];
var overlappingData = findOverlappingData(data);
console.log(overlappingData); // 输出 [2, 3]