如果javascript中的else导致缺少值

if else in javascript leading to missing values

本文关键字：javascript 中的 else 如果      更新时间：2023-09-26

我有JSON格式的数据。跟随我的JSON字符串：

var dataString4 = {"Details":[{"ObservationSource":"Outpatient Clinic","observationValue":98.69999694824219,"ReadingName":"Body Temperature",
"ObservationDateTime":"2014,08,01","ReadingType":"Vitals"},{"ObservationSource":"Outpatient Clinic",
"observationValue":66,"ReadingName":"Heart Rate","ObservationDateTime":"2014,08,01",
"ReadingType":"Vitals"},{"ObservationSource":"Patient Self Reported","observationValue":98.5,"ReadingName":"Body Temperature","ObservationDateTime":"2014,08,02",
"ReadingType":"Vitals"},{"ObservationSource":"Patient Self Reported","observationValue":62,"ReadingName":"Heart Rate","ObservationDateTime":"2014,08,02","ReadingType":"Vitals"},{"ObservationSource":"Patient Self Reported","observationValue":98.4000015258789,"ReadingName":"Body Temperature","ObservationDateTime":"2014,08,15","ReadingType":"Vitals"},{"ObservationSource":"Patient Self Reported","observationValue":65,"ReadingName":"Heart Rate","ObservationDateTime":"2014,08,15","ReadingType":"Vitals"},{"ObservationSource":"Patient Self Reported","observationValue":98.0999984741211,"ReadingName":"Body Temperature","ObservationDateTime":"2014,08,21","ReadingType":"Vitals"},{"ObservationSource":"Patient Self Reported","observationValue":61,"ReadingName":"Heart Rate","ObservationDateTime":"2014,08,21","ReadingType":"Vitals"},{"ObservationSource":"Outpatient Clinic","observationValue":98.5,"ReadingName":"Body Temperature","ObservationDateTime":"2014,09,01","ReadingType":"Vitals"},{"ObservationSource":"Outpatient Clinic","observationValue":65,"ReadingName":"Heart Rate","ObservationDateTime":"2014,09,01","ReadingType":"Vitals"},{"ObservationSource":"Patient Self Reported","observationValue":98.69999694824219,"ReadingName":"Body Temperature","ObservationDateTime":"2014,09,07","ReadingType":"Vitals"},{"ObservationSource":"Patient Self Reported","observationValue":67,"ReadingName":"Heart Rate","ObservationDateTime":"2014,09,07","ReadingType":"Vitals"}]};

在上面的JOSN字符串中，Reading name值的一半具有Heart Rate，其余一半具有Body Temperature。

然后，我有一段代码来添加值：

for(var i=0; i<queryObjectLen; i++)
                {
                    //console.log(queryObject.Details[i].DeptName);
                    var ObservationDateTime=  new Date(queryObject.Details[i].ObservationDateTime);
                    var observationValueHeartRate;
                    var observationValueBodyTempearture;
                   var value =  queryObject.Details[i].ReadingName 
                 if(value ='Heart Rate')
                   {  observationValueHeartRate= queryObject.Details[i].observationValue;
                   console.log(ObservationDateTime);
                   console.log("HeartRate" + observationValueHeartRate);
                   }
                  else
                   {
                   observationValueBodyTempearture= queryObject.Details[i].observationValue;
                   console.log(ObservationDateTime);
                   console.log("bodytemp " + observationValueBodyTempearture);
                   }
                     arrdata.addRows([
                        [ObservationDateTime,parseInt(observationValueHeartRate), parseFloat(observationValueBodyTempearture)]
                    ]);

问题：根据以上陈述，我只得到心率的值，而没有得到体温的值。上面的代码似乎出了什么问题？

您使用了单个"="登录if语句。要进行比较，需要在if语句中使用"=="。

在这里签出这个Fiddle示例

我正在使用开源项目jinqJshttp://www.jinqJs.com以查询您的收藏。

    //Use jsJinq.com open source library
var dataString4 = {
    "Details":[
        {"ObservationSource":"Outpatient Clinic","observationValue":98.69999694824219,"ReadingName":"Body Temperature",
            "ObservationDateTime":"2014,08,01","ReadingType":"Vitals"},{"ObservationSource":"Outpatient Clinic",
            "observationValue":66,"ReadingName":"Heart Rate","ObservationDateTime":"2014,08,01",
            "ReadingType":"Vitals"},
        {"ObservationSource":"Patient Self Reported","observationValue":98.5,"ReadingName":"Body Temperature","ObservationDateTime":"2014,08,02",
            "ReadingType":"Vitals"},{"ObservationSource":"Patient Self Reported","observationValue":62,"ReadingName":"Heart Rate","ObservationDateTime":"2014,08,02","ReadingType":"Vitals"},{"ObservationSource":"Patient Self Reported","observationValue":98.4000015258789,"ReadingName":"Body Temperature","ObservationDateTime":"2014,08,15","ReadingType":"Vitals"},{"ObservationSource":"Patient Self Reported","observationValue":65,"ReadingName":"Heart Rate","ObservationDateTime":"2014,08,15","ReadingType":"Vitals"},
        {"ObservationSource":"Patient Self Reported","observationValue":98.0999984741211,"ReadingName":"Body Temperature","ObservationDateTime":"2014,08,21","ReadingType":"Vitals"},{"ObservationSource":"Patient Self Reported","observationValue":61,"ReadingName":"Heart Rate","ObservationDateTime":"2014,08,21","ReadingType":"Vitals"},{"ObservationSource":"Outpatient Clinic","observationValue":98.5,"ReadingName":"Body Temperature","ObservationDateTime":"2014,09,01","ReadingType":"Vitals"},
    {"ObservationSource":"Outpatient Clinic","observationValue":65,"ReadingName":"Heart Rate","ObservationDateTime":"2014,09,01","ReadingType":"Vitals"},
    {"ObservationSource":"Patient Self Reported","observationValue":98.69999694824219,"ReadingName":"Body Temperature","ObservationDateTime":"2014,09,07","ReadingType":"Vitals"},{"ObservationSource":"Patient Self Reported","observationValue":67,"ReadingName":"Heart Rate","ObservationDateTime":"2014,09,07","ReadingType":"Vitals"}]};
var result = jinqJs().from(dataString4.Details).select();
document.body.innerHTML = '<pre>' + JSON.stringify(result, null, 4) + '</pre>';

然后，您可以对结果执行groupBy或使用聚合函数。如果你想要更多的例子，请告诉我。

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