javascript中的if-else导致缺少值

我有JSON格式的数据。遵循我的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，读取名称的值的一半有心率，另一半有体温

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)]
                    ]);

for（var i=0；i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“==”。
签出此选项

我正在使用开源项目jinqJs来查询您的收藏

    //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>';

//使用jsJinq.com开源库
变量dataString4={
“详情”：[
{“ObservationSource”：“门诊”，“observationValue”：98.69999494824219，“ReadingName”：“体温”，
“ObservationDateTime:“2014,08,01”，“ReadingType:“Vitals”}，{“ObservationSource:“门诊部”，
“observationValue”：66，“ReadingName”：“心率”，“ObservationDateTime”：“2014,08,01”，
“ReadingType”：“Vitals”}，
{“ObservationSource”：“患者自我报告”，“observationValue”：98.5，“ReadingName”：“体温”，“ObservationDateTime”：“2014,08,02”，
“阅读类型”：“Vitals”}，{“ObservationSource”：“患者自我报告”，“观察值”：62，“阅读姓名”：“心率”，“观察日期时间”：“2014,08,02”，“阅读类型”：“Vitals”}，{“ObservationSource”：“患者自我报告”，“观察值”：98.4000015258789，“阅读姓名”：“体温”，“观察日期时间”：“2014,08,15”，“阅读类型”：“Vitals”}，{“ObservationSource”：“患者自我报告”，“observationValue”：65，“ReadingName”：“心率”，“ObservationDateTime”：“2014,08,15”，“ReadingType”：“Vitals”}，
{“观察来源”：“患者自我报告”，“观察值”：98.0999984741211，“阅读姓名”：“体温”，“观察日期时间”：“2014,08,21”，“阅读类型”：“生命体征”}，{“观察来源”：“患者自我报告”，“观察值”：61，“阅读姓名”：“心率”，“观察日期时间”：“2014,08,21”，“阅读类型”：“生命体征”}，{“观察来源”：“门诊”，“观察值”：98.5，“读数名称”：“体温”，“观察日期时间”：“2014,09,01”，“读数类型”：“生命体征”}，
{“ObservationSource”：“门诊”，“observationValue”：65，“ReadingName”：“心率”，“ObservationDateTime”：“2014,09,01”，“ReadingType”：“Vitals”}，
{“观察来源”：“患者自我报告”，“观察值”：98.69999694824219，“阅读姓名”：“体温”，“观察日期时间”：“2014,09,07”，“阅读类型”：“生命体征”}，{“观察来源”：“患者自我报告”，“观察值”：67，“阅读姓名”：“心率”，“观察日期时间”：“2014,09,07”，“阅读类型”：“生命体征”}；
var result=jinqJs（）.from（dataString4.Details）.select（）；
document.body.innerHTML=''+JSON.stringify（结果，null，4）+''；

然后，您可以对结果执行groupBy或使用聚合函数。如果需要更多示例，请告诉我。
请检查，
=
是赋值运算符，请尝试使用
=
或
==