连续流列出，没有重复

Posted 2023-02-23

【中文标题】连续流列出，没有重复

【英文标题】：Continuous stream to list with no repeats

【发布时间】：2021-02-05 00:33:50

【问题描述】：

我有一个数据流，我想将其转换为键值对的列表/映射。我想将每个“故障”与相应的“严重性”配对并将这些对显示为列表。我的问题是我的列表不断增长，我无法检查正在添加的值是否已经在列表中。

代码：

  List<int> severityList = [0];
  List faultItems = [0];
  var lastFault;

  Widget _buildFaultOutput(snapshot) 
    //New growable lists with 0 set as the first value to prevent error

    var msg = snapshot.data;
    print(msg);

    var faultList = msg["fault_list"];
    print("faultList: $faultList");

    var numberOfFaults = faultList.length;
    print("Number of faults: $numberOfFaults");

    if (faultList.length == 0) 
      return Text("None");
     else 
      int i = 0;

      for (var i = 0; i < faultList.length; i++) 
        // print(faults);
        // print("i: $i");
        var faults = faultList[i];
        var motorCurrent = faults["fault"];
        var severity = faults["severity"];

        if (motorCurrent != lastFault) 
          faultItems.insert(i, motorCurrent);
          severityList.insert(i, severity);
          print('added $faultItems[i], severity: $severityList[i]');

          lastFault = motorCurrent;
         else 

        //TODO: add list of faults with key/value pairs (fault:severity): Text of "motorCurrent" in color of severity

        //TODO: Print each individual item from list with severity
        // return Text(
        //     "Number of Faults: $faultList.length\n$faultItems\nSeverity: $severityList[i]");
      
    
    return Text(
        "Number of Faults: $faultList.length\n$faultItems\nSeverity: $severityList");
  

示例数据：

I/flutter (21022): fault_list: [fault: voltage fault, process_name: BetaFirmware::bmsVoltageFaultCallback(), severity: 0, time_stamp: secs: 1603209904, nsecs: 581818990, fault: motor temp: 2, process_name: BetaFirmwareBase::checkMotorSafety(), severity: 2, time_stamp: secs: 1603209905, nsecs: 575800930, fault: motor temp: 5, process_name: BetaFirmwareBase::checkMotorSafety(), severity: 2, time_stamp: secs: 1603209905, nsecs: 575800930, fault: motor temp: 6, process_name: BetaFirmwareBase::checkMotorSafety(), severity: 2, time_stamp: secs: 1603209905, nsecs: 620800930, fault: motor temp: 3, process_name: BetaFirmwareBase::checkMotorSafety(), severity: 2, time_stamp: secs: 1603209905, nsecs: 620800930, fault: motor temp: 9, process_name: BetaFirmwareBase::checkMotorSafety(), severity: 2, time_stamp: secs: 1603209905, nsecs: 620800930, fault: motor temp: 4, process_name: BetaFirmwareBase::checkMotorSafety(), severity: 2, time_stamp: secs: 1603209905, nsecs: 620800930, fault: motor temp: 7, process_na
I/flutter (21022): faultList: [fault: voltage fault, process_name: BetaFirmware::bmsVoltageFaultCallback(), severity: 0, time_stamp: secs: 1603209904, nsecs: 581818990, fault: motor temp: 2, process_name: BetaFirmwareBase::checkMotorSafety(), severity: 2, time_stamp: secs: 1603209905, nsecs: 575800930, fault: motor temp: 5, process_name: BetaFirmwareBase::checkMotorSafety(), severity: 2, time_stamp: secs: 1603209905, nsecs: 575800930, fault: motor temp: 6,

【参考方案1】：

在方法_buildFaultOutput(snapshot)的开头添加severityList.clear()和faultList.clear()行

【讨论】：

谢谢！这正是我所需要的！

你知道如何并排显示故障列表和严重性列表中的每个项目吗？

在列表视图中返回 Row 小部件，并将故障列表项和严重性列表项放置为子项