Where'd you see it?
https://cs.bigmachine.io/videos/binary-math

What's the problem?
This is what I saw:
I see the video for Bitwise Operators (the next section) displayed on the website. When I click the download button, I get the proper video for Binary Math.

This is what I think it should be:
The Binary Mathematics video

How are you watching the video?
Chrome v 92.0 on a Mac.

A bit on confusion on my end working through the Bridge pattern. Hopefully someone can point me to where I'm going wrong.

The initial problem comes from wanting to formalize data access without implementing the API in every adapter. So

class SalesRepository{
  // constructor and other stuff
  getCart(key){
    return this.db.cart.get(key);
  };
}

means we have to give every adapter a cart with get functionality, which could be difficult to maintain. So far so good.

The CartRetrieval bridge comes to the rescue, allowing us to house the get logic in one place and add the bridge to our adapters, like so:

const CartRetrieval = (db) => {
  return {
    get: (id) => console.log(`Getting from ${db.name}`),
  }
}

class PgAdapter{
  constructor(){
    this.name = "Postgres Adapter";
    this.cart = CartRetrieval(this);
  };
  // Other stuff
}

So here is my confusion: The body of our bridge's get method is just a dummy console.log that is meant to stand in the place of the logic needed to get a particular cart.

But each database may require a different logic to perform that get, right? How does the get method in the CartRetrievalknow which to use? Would we switch on the db type passed in, supplying a different strategy depending on the adapter? Should the bridge delegate back to the adapter, in which case we're back to each adapter needing to implement the API?

Thanks in advance for any help!

Just a heads up there are a couple of typos in your readme text. Hanbook and east - should be Handbook and easy. Other than that great work on these videos!

This is the code for the 16 video walkthroughs in the Imposter's Hanbook. If you want to follow along, you'll need to have Node installed (6+) and, optionally, Elixir if you want to do the functional programming stuff (which you should!).

I do all of the samples within the Atom text editor using the Script Runner plugin, which is east to find and install.