Question

我有从Web服务返回的json对象。 Web服务对象：

var seriesData = [{
    feederId: "PTS113T",
    businessEventCode: "LowVoltage",
    servicePointEventCount: 6,
    startDayID: 20130812,
}, {
    feederId: "PTS113T",
    businessEventCode: "HighVoltage",
    servicePointEventCount: 2,
    startDayID: 20130812,
}, {
    feederId: "PTS113T",
    businessEventCode: "LowVoltage",
    servicePointEventCount: 7,
    startDayID: 20130814,
}, {
    feederId: "PTS113T",
    businessEventCode: "HighVoltage",
    servicePointEventCount: 5,
    startDayID: 20130815,
}];

我想将该对象修改为..

我startDayID startDayID businessEventCode: "LowVoltage" businessEventCode: "HighVoltage",或var seriesData = [{ feederId: "PTS113T", servicePointEventLowCount: 6, servicePointEventHighCount: 2, startDayID: 20130812, }, { feederId: "PTS113T", servicePointEventLowCount: 7, startDayID: 20130814, }, { feederId: "PTS113T", servicePointEventHighCount: 5, startDayID: 20130815, }];

有两个值或单值

想要：

if (seriesData) {
    var mockdata = [];
    for (var i = 0; i < seriesData.length; i += 2) {
        var data = {};
        //data.feederId = seriesData[i].feederId;
        if ((seriesData[i].startDayID) == (seriesData[i + 1].startDayID)) {
            data.feederId = seriesData[i].feederId;
            data.servicePointEventLowCount = seriesData[i].servicePointEventCount;
            data.servicePointEventHighCount = seriesData[i + 1].servicePointEventCount;
            data.startDayID = seriesData[i].startDayID;
        } else {
            data.feederId = seriesData[i].feederId;
            data.startDayID = seriesData[i].startDayID;

            if (seriesData[i].businessEventCode == 'LowVoltage') {
                data.servicePointEventLowCount = seriesData[i].servicePointEventCount;
                data.servicePointEventHighCount = 0;
            } else {
                data.servicePointEventHighCount = seriesData[i].servicePointEventCount;
                data.servicePointEventLowCount = 0;
            }

       }
        mockdata.push(data);
    }

我在做什么：

{{1}}

Answer 1

试试这个。

var mockdata = [];

// for check whether startDayID exist
//and temporary storage for data relative key(startDayID) 
var mockDataKeyMap ={}; 

for (var i = 0; i < seriesData.length; i ++) {
    var item = seriesData[i];
    var key = item.startDayID;

    var data = null;

    if(!mockDataKeyMap[key]){

        // startDayID do not exist create new
        data = {};

        // save for get after (below else sentence)
        mockDataKeyMap[key] = data; 

        // push into
        mockdata.push(data);

        // set default info
        data.feederId = item.feederId;
        data.startDayID = item.startDayID;

    }else{

        // if startDayID exist get data from map
        data= mockDataKeyMap[key]; 
    }

    if (item.businessEventCode === 'LowVoltage') {
        data.servicePointEventLowCount = item.servicePointEventCount;
    } 
    if (item.businessEventCode === 'HighVoltage') {
        data.servicePointEventHighCount = item.servicePointEventCount;
    }
}

使用"i+=2"

非常危险

您的seriesData始终没有数据LowVoltage和HighVoltage。

然后检查所有数据i++

然后仅检查密钥是否已存在

Answer 2

尝试：

for (var i = 0; i < seriesData.length-1; i += 2) {

Answer 3

根据您上次运行的循环，您在处理时不会seriesData[i + 1].startDayID更好地检查此情况。

循环内的json对象修改不起作用

3 个答案: