检查是否有重复的值，然后弹出消息google script

function checkDuplicates() {
  var sheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet();
  var data = sheet.getDataRange().getValues();
  var duplicates = [];
  
  for (var i = 0; i < data.length; i++) {
    for (var j = i + 1; j < data.length; j++) {
      if (data[i].toString() === data[j].toString()) {
        duplicates.push(data[i]);
        break;
      }
    }
  }
  
  if (duplicates.length > 0) {
    var message = "以下是重复的值：\n\n";
    for (var k = 0; k < duplicates.length; k++) {
      message += duplicates[k].join(", ") + "\n";
    }
    Browser.msgBox(message);
  } else {
    Browser.msgBox("没有重复的值。");
  }
}