Issue with JavaScript recursive function

Question

I have an object with nested objects. I need to get all the keys and values from all the sub objects into one array.

So I'm trying to do it with a recursive function, but I guess I'm doing something wrong...

The object :

var jsonobj = {
 "gender": "male",
 "country": "us",
 "phone": "06 12 34 56 78",
 "enterprise": {
 "parameters": {
 "company": "foo",
 "companyID": "12345678912345",
 "address": "adress principale",
 }
 },
 "contacts": [],
 "requirements": []
 }

Here is the function :

 function check(arr){
 var val = '';
 $.each(arr, function(k, v) {
 if (typeof v == "object" && v.length !== 0) {
 val = check(v); 
 }
 });
 return val;
 }

And this is the function using it :

function rec_res(obj_res) {
 var foo=[];
 $.each(jsonobj, function(k, v) {
 if (typeof v == "object" && v.length !== 0) {
 g = check(jsonobj); // calling the function
 foo.push(g);
 } else {
 foo.push(v);
 }
 });
 console.log(foo);
};

Expected output:

 [foo:{
 "gender": "male",
 "country": "us",
 "phone": "06 12 34 56 78",
 "company": "foo",
 "companyID": "12345678912345",
 "address": "adress principale",
 }]

Fiddle

• Federico klez Culloca: You didn't state what the problem is. Please add it to the question.
• zabusa: what is your expected output
• RoyBarOn: @zabusa I've updated the question
• RoyBarOn: @FedericoklezCulloca thanks - check again - the function gives me error Maximum call stack size exceeded
• Niet the Dark Absol: jsonobj appears to be a global variable and you keep using that, when you probably meant $.each(obj, ...)

Answer 1

You can create recursive function with Object.keys() and reduce() methods.

var jsonobj = {
 "gender": "male",
 "country": "us",
 "phone": "06 12 34 56 78",
 "enterprise": {
 "parameters": {
 "company": "foo",
 "companyID": "12345678912345",
 "address": "adress principale",
 }
 },
 "contacts": [],
 "requirements": []
}
function rec_res(obj) {
 return Object.keys(obj).reduce((r, e) => {
 if(typeof obj[e] == 'object') Object.assign(r, rec_res(obj[e]))
 else r[e] = obj[e];
 return r;
 }, {})
}
console.log(rec_res(jsonobj))

• RoyBarOn: Sorry - i can't implement it , need it to be native.... any idea why mine isn't working?
• Nenad Vracar: What do you mean by native?

Answer 2

var jsonobj = {
 "gender": "male",
 "country": "us",
 "phone": "06 12 34 56 78",
 "enterprise": {
 "parameters": {
 "company": "foo",
 "companyID": "12345678912345",
 "address": "adress principale",
 }
 },
 "contacts": [],
 "requirements": []
}
var result=[];
function rec_res(obj_res) {
var foo=[];
 $.each(Object.keys(obj_res), function(k, v) {
 if (typeof obj_res[v] == "object") {
 var data = rec_res(obj_res[v]);
 if(data!=undefined && data.length!=0){
 data.map(function(d){
 result.push(d);
 });
 }
 } else {
result.push({[v]:obj_res[v]});
foo.push({[v]:obj_res[v]});
 }
 return foo;
 });
//console.log(foo);
};
rec_res(jsonobj);
alert(JSON.stringify(result));