Add a Key Value Pair to an array of objects in javascript?

Question

If I had an array as such:

var myarray = [];

myarray.push({
    "Name": 'Adam',
    "Age": 33
});

myarray.push({
    "Name": 'Emily',
    "Age": 32
});

This gives me an array where I can pull out values like myarray[0].Name which would give me "Adam".

However, after this array is built, how can I add an "address" field with a value of "somewhere street" into the array at position [0], so that my fields in that object at position zero are now Name, Age, and Address with corresponding values?

I was thinking splice() somehow but couldn't find an example using objects, just examples with simple arrays.

Why can't you do myarray[0].address = "somewhere street"?

haim770
– haim770

2014-05-20 19:27:17 +00:00
Commented May 20, 2014 at 19:27 — haim770
– haim770, Commented May 20, 2014 at 19:27

Paul Roub · Accepted Answer · 2017-08-18 13:25:35Z

27

You can simply add properties ("fields") on the fly.

Try

myarray[0].Address = "123 Some St.";

or

myarray[0]["Address"] = "123 Some St.";

var myarray = [];

myarray.push({
    "Name": 'Adam',
    "Age": 33
});

myarray.push({
    "Name": 'Emily',
    "Age": 32
});

myarray[0]["Address"] = "123 Some St.";

console.log( JSON.stringify( myarray, null, 2 ) );

edited Aug 18, 2017 at 13:25

answered May 20, 2014 at 19:27

Paul Roub

36.5k27 gold badges88 silver badges95 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

cherryblossom · Accepted Answer · 2020-09-01 00:14:01Z

9

Along with a single value like

myarray[0].address = "your address";

You could even add a nested property on the fly as below:

myarray[0].address = { presentAddress: "my present address..." };

and get the value as myarray[0].address.presentAddress;.

edited Sep 1, 2020 at 0:14

cherryblossom

14.4k2 gold badges38 silver badges68 bronze badges

answered Mar 21, 2016 at 6:03

Rashedul.Rubel

3,61928 silver badges39 bronze badges

Collectives™ on Stack Overflow

Add a Key Value Pair to an array of objects in javascript?

2 Answers 2

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related