how to combine values of a json array?

I found a solution with your help thanks...

var oDataModel=new sap.ui.model.odata.ODataModel("odataurl", true);

var items;

oDataModel.read("/WorkflowTaskCollection?$format=json&$orderby=workitem_id desc", null, null, false,function success(oData){

items=oData.results.length;

var jsonDashboard = {"mycollection":[]};

//var jnew = {"mycollectionnew":[]};

var data = oData.results;

//a var data1 = jsonDashboard.mycollection;

for (i = 0; i < data.length; i++)

{

var subject = data[i].subject.split("^^");

//alert(subject[1]);

var x = subject[0];

var y = subject[1];

var z = 1;

if (jsonDashboard.mycollection.length == 0){

jsonDashboard.mycollection.push({"module":x, "severity":y,"count":z});

}

else {

for(j = 0; j < jsonDashboard.mycollection.length; j++)

{

if(jsonDashboard.mycollection[j].module == x )

{

if(jsonDashboard.mycollection[j].severity == y){

jsonDashboard.mycollection[j].count = jsonDashboard.mycollection[j].count + 1;

var flag = 0;

break;

}

}

else{

//if(!(jsonDashboard.mycollection[j].module == x) && !(jsonDashboard.mycollection[j].severity == y)){

var flag = 1;

// }

//jsonDashboard.mycollection.push({"module":x, "severity":y,"count":z});}

}

}

if (flag == 1){

jsonDashboard.mycollection.push({"module":x, "severity":y,"count":z});

}

}

}

}, function failure(){employeeNo=1000;});