How to access nested object array Javascript

Question

I know this has been asked before but I can't seem to find the answer. I just want to know how to access the values in service_name array in a console.log

Below is the array and just a snip out of the data.

var a = [{"ID":102254,"Name":"obj 1","service_name":["Open Ticket","Escalation Ticket"]},{"ID":226619,"Name":"DIDE","service_name":["Open Ticket","Escalation Ticket"]},{"ID":224522,"Name":"CAT","service_name":["Open Ticket","Escalation Ticket"]},{"ID":122533,"Name":"Mirror","service_name":["Open Ticket","Escalation Ticket"]}]
console.log(JSON.stringify(a, 0, 4))

• mhodges: Well, you have an array of objects, each object containing a service_name array. Do you just want a single one, or do you want an array of the arrays, etc.? What would your desired final result look like?
• user3292394: I will be filtering down the above array to just one ID. and then will want to access just the service_name info for that ID
• mhodges: Answer posted. Let me know if that's what you were looking for
• user3292394: Just marked, an answer, thanks for all the responses, they all do what I was looking for, but the one I marked suits my needs best. Many thanks
• Heretic Monkey: Possible duplicate of Access / process (nested) objects, arrays or JSON

Answer 1

you can access it like an array, this is how you would access the service_name values in the 4th item in the array

var a = [{"ID":102254,"Name":"obj 1","service_name":["Open Ticket","Escalation Ticket"]},{"ID":226619,"Name":"DIDE","service_name":["Open Ticket","Escalation Ticket"]},{"ID":224522,"Name":"CAT","service_name":["Open Ticket","Escalation Ticket"]},{"ID":122533,"Name":"Mirror","service_name":["Open Ticket","Escalation Ticket"]}]
console.log(JSON.stringify(a[3].service_name[0]))
console.log(JSON.stringify(a[3].service_name[1]))

• user3292394: This does exactly what i needed

Answer 2

var a = [{"ID":102254,"Name":"obj 1","service_name":["Open Ticket","Escalation Ticket"]},{"ID":226619,"Name":"DIDE","service_name":["Open Ticket","Escalation Ticket"]},{"ID":224522,"Name":"CAT","service_name":["Open Ticket","Escalation Ticket"]},{"ID":122533,"Name":"Mirror","service_name":["Open Ticket","Escalation Ticket"]}]
a.forEach(function(element) {
 console.log(element.service_name);
});

Answer 3

Just do:

var a = [{"ID":102254,"Name":"obj 1","service_name":["Open Ticket","Escalation Ticket"]},{"ID":226619,"Name":"DIDE","service_name":["Open Ticket","Escalation Ticket"]},{"ID":224522,"Name":"CAT","service_name":["Open Ticket","Escalation Ticket"]},{"ID":122533,"Name":"Mirror","service_name":["Open Ticket","Escalation Ticket"]}]
a.forEach((e)=>console.log(e.service_name));

if you need a result array:

var a = [{"ID":102254,"Name":"obj 1","service_name":["Open Ticket","Escalation Ticket"]},{"ID":226619,"Name":"DIDE","service_name":["Open Ticket","Escalation Ticket"]},{"ID":224522,"Name":"CAT","service_name":["Open Ticket","Escalation Ticket"]},{"ID":122533,"Name":"Mirror","service_name":["Open Ticket","Escalation Ticket"]}]
var res = a.map((e)=>e.service_name);
console.log(res);

Answer 4

You can create a function to return the service names array of the element whose ID matches the id you are looking for like so:

function getServiceNamesById (data, id) {
 for (var i = 0; i < data.length; i++) {
 if (data[i].ID === id) {
 return data[i].service_name;
 }
 }
 return [];
}
var a = [{"ID":102254,"Name":"obj 1","service_name":["Open Ticket","Escalation Ticket"]},{"ID":226619,"Name":"DIDE","service_name":["Open Ticket","Escalation Ticket"]},{"ID":224522,"Name":"CAT","service_name":["Open Ticket","Escalation Ticket"]},{"ID":122533,"Name":"Mirror","service_name":["Open Ticket","Escalation Ticket"]}];
var id = 226619;
console.log(getServiceNamesById(a, id));

Answer 5

Try this one :

 var a = [{"ID":102254,"Name":"obj 1","service_name":["Open Ticket","Escalation Ticket"]},{"ID":226619,"Name":"DIDE","service_name":["Open Ticket","Escalation Ticket"]},{"ID":224522,"Name":"CAT","service_name":["Open Ticket","Escalation Ticket"]},{"ID":122533,"Name":"Mirror","service_name":["Open Ticket","Escalation Ticket"]}]
 a.forEach(function(item){ // item is an object
 item.service_name.forEach(function(service){ //item.service_name is an array
 console.log(service);
 });
 });

Good luck