2nd challenge

Hey Matt,

This was a tricky challenge overall so let's break it down.

So for the first part of the challenge, you did it correctly however there is a shorter way to do it.

public void addForgottenVideo(Course course) {
    // TODO(1):  Create a new video called "The Beginning Bits"

Video vids= new Video("The Beginning Bits");

    // TODO(2):  Add the newly created video to the course videos as the second video.

course.getVideos().add(1, vids);
  }

Instead of initializing a new list, we can just chain methods. When a Course object is passed through, we can directly call the getVideos() method and then chain it directly to the add() method.

(2) ok for part 2:

For this, we want to loop through the video list in the course object that Craig will pass in. First instantiate a new Map. You can do either a HashMap or TreeMap but it didn't specify in the instructions so either is fine. Using the same method as above (the getVideos() method), we want to get all the videos from the course object. We then loop through that and store each one as a Video object. Then inside the loop, we can now add each video title and oibject to the map. Since maps are unique and dont contain duplicates, we dont have to check whether or not it's already in our map. So get the title of each video and store it as a string. Finally place that title as the fire parameter of the map and the current video we're looping as the second parameter of the map. You could also skip storing the video title as a string and instead just directly put that method inside of the put() method as the first parameter. In case it's still confusing, I put a few solutions below

public Map<String, Video> videosByTitle(Course course) {
    Map<String, Video> vidMap = new TreeMap<>();
    for (Video currentVids : course.getVideos()) {
        String title = currentVids.getTitle(); //store as variable
         vidMap.put(title, currentVids); //variable as key, video object as value
    } 

    return vidMap;
  }

OR

public Map<String, Video> videosByTitle(Course course) {
    Map<String, Video> vidMap = new TreeMap<>();
    for (Video currentVids : course.getVideos()) {
         vidMap.put(currentVids.getTitle(), currentVids); //doing the above in one step
    } 

    return vidMap;
  }

this one is just to show how it would work if it was a list where duplicates are allowed. you wouldnt use this one though in terms of our current scenario

public Map<String, Video> videosByTitle(Course course) {
    Map<String, Video> map = new TreeMap<>();
    for (Video videos : course.getVideos()) {
      if (!map.containsKey(videos.getTitle())) { //if the video title is not in our list then add it otherwise just continue loopin
      map.put(videos.getTitle(), videos);
      }
    }
    return map;
  }
}

I hope that solved your problems to #2.

If I helped dont forget to mark as best answer so others can see,

Best of luck and happy coding,

Kevin