Push nested json values to array using node js - arrays

Question

I need to show my json results into nested array format:
{
"state": [
{
"stateName": "tamilnadu"
}
],
"city": [
{
"cityName": "chennai"
}
]
}
This is my code. I'm new in node development
exports.stateId = function (req, res) {
state.find(req.body.countryId, function() {
var query = N1qlQuery.fromString('SELECT stateId,stateName FROM travel _type='state'');
myBucket.query(query, async function(err, result) {
var state=[];
await result.forEach(ele => {
var item= {
stateName:ele.stateName
}
if(ele.stateName != undefined)
state.push(item);
});
res.send({state});
});
});
};
exports.cityId = function (req, res) {
city.find(req.body.stateId, function() {
var query = N1qlQuery.fromString('SELECT cityId,cityName FROM travel where _type="city"');
myCluster.query(query, async function(err, result) {
var city=[];
await result.forEach(ele => {
var item= {
cityName:ele.cityName
}
if(ele.cityName != undefined)
city.push(item);
});
res.send({city});
});
});
};
Currently i will get results like two different array. i need to merge json results into single nested data

Answer 1

If you have the following data:
const data_1 =
{
"state": [
{ "stateName": "tamilnadu" }
]
};
const data_2 =
{
"city": [
{ "cityName": "chennai" } ]
};
and your desired object is:
{
"state": [
{
"stateName": "tamilnadu"
}
],
"city": [
{
"cityName": "chennai"
}
]
}
then you can use Object.assign method:
let desired = Object.assign({}, data_1, data_2);
console.log(`desired: `, desired)