Add attribute/element to existing javascript array

Question

I have a JavaScript object

const categories = Object.keys(titles);

that looks like this

["scifi","horror","comedy"]

I want to add "drama" to the object. I've tried

categories['drama'];

but that doesn't work. How can I add another category to this categories object?

I'm voting to close. Read the fine manual ~ https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/push — Phil, Jun 10 '16 at 02:37
FYI, `categories` is an `Array`. See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys — Phil, Jun 10 '16 at 02:39
Or there is also [How to insert an item into an array at a specific index?](http://stackoverflow.com/q/586182/1529630) — Oriol, Jun 10 '16 at 02:47

score 2 · Accepted Answer · answered Jun 10 '16 at 02:36

2

It's an array of object keys so you need to use Array#push() method

categories.push('drama');

const categories = ["scifi", "horror", "comedy"];

categories.push('drama');

console.log(categories);

answered Jun 10 '16 at 02:36

Pranav C Balan

Awesome thank you! Also, how would iI remove something from an array? – Modelesq Jun 10 '16 at 02:53
@Modelesq : `splice()` method can be used – Pranav C Balan Jun 10 '16 at 02:57

1 Answers1