How can I push an array into an object

Question

I'm looking for a way to push an array into an object.

Chek this out:

var playlists = {
  playlist01: [],
  playlist02: [],
  playlist03: []
};

Now I need to push a new array, named "playlist04", but I don't know the name, I have it in a var name.

Something like this: playlists.push($foo: []);

Can anyone help me?

Thank you and greetings!

Answer 1

You push things into arrays. You add properties to objects. It's as simple as this:

playlists.playlist04 = [];

Or if I'm interpreting your latter code correctly, like this:

playlists.playlist04 = $foo;

Or if you don't know the name that you want for the property but you have that name stored in a variable, you can use bracket notation:

playlists[$foo] = [];