I came up with a slightly different solution to problem 15-intersection which follows from problem 14-extends.

interface UserWithPosts extends User {
  posts: Post[]
}

This interface also passes the type check and it creates a slightly different code completion on WebStorm (at least)

Vs the video solution using &

There is no massive difference between the 2 but I thought I'd mention it. I imagine using the & operator with type is like using the extends with interfaces. They do the same as far as I can tell.

Thanks a ton for the great content! :)