json object modification within loop is not working

Question

I have json object return from the web service. Web service Object :

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,
}];

I want to modified that object into..

I have startDayID for every startDayID there will be two value or single value for businessEventCode: "LowVoltage", or businessEventCode: "HighVoltage",

Want to :

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

What i am doing :

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);
    }

Looks alright. How does the mockdata array look after loop has executed? — springbo
– springbo, Commented Sep 26, 2014 at 9:27
@springbo It is not displaying second last value... json value can be in any format so i cant compare i and i+2 value.. I guess u understood — FrontEnd Expert
– FrontEnd Expert, Commented Sep 26, 2014 at 9:30

FrontEnd Expert · Accepted Answer · 2014-09-26 10:49:27Z

try this.

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;
    }
}

it is very dangerous to use "i+=2"

Your seriesData always do not have couple of data LowVoltage and HighVoltage.

Then check all data i++

Then check only key is already exist or not

springbo · Accepted Answer · 2014-09-26 09:30:59Z

0

try:

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

answered Sep 26, 2014 at 9:30

springbo

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Comments

Suchit kumar · Accepted Answer · 2014-09-26 09:33:22Z

0

as per your loop for the last run you will not have seriesData[i + 1].startDayID better check this condition while processing.

answered Sep 26, 2014 at 9:33

Suchit kumar

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