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Java Java Data Structures - Retired Efficiency! Changing Course

Karim Zibari
Karim Zibari
7,358 Points

This question is not clear what it is asking for. It's not even grammatically written!

The questions is confusing, I think. The name of the method is asking for videos, whereas the return is a map of title to video!

com/example/model/Course.java
package com.example.model;

import java.util.List;

public class Course {
  private String mName;
  private List<Video> mVideos; 

  public Course(String name, List<Video> videos) {
    mName = name;
    mVideos = videos;
  }

  public String getName() {
    return mName;
  }

  public List<Video> getVideos() {
    return mVideos;
  }

}
com/example/model/Video.java
package com.example.model;

public class Video {
  private String mTitle;

  public Video(String title) {
    mTitle = title;
  }

  public String getTitle() {
    return mTitle;
  }

  public void setTitle(String title) {
    mTitle = title;
  }

}
QuickFix.java
import com.example.model.Course;
import com.example.model.Video;

import java.util.Map;
import java.util.List;

public class QuickFix {

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

    // TODO(2):  Add the newly created video to the course videos as the second video.
    course.getVideos().add(1, v);

  }

  public void fixVideoTitle(Course course, String oldTitle, String newTitle) {

  }

  public Map<String, Video> videosByTitle(Course course) {
        Map<String, Video> m=new HashMap<>();
        m.put(course.getName(), course.
        return null;
  }

}

1 Answer

Florian Tönjes
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Florian Tönjes
Full Stack JavaScript Techdegree Graduate 50,856 Points

Hi Karim,

you have to loop over all the videos of the course and add the title and the video itself to the map. Here some pseudo code:

public Map<String, Video> videosByTitle(Course course) {
    Create a map
    Loop over all videos of the course
         Map video title to video in the map
   return the map

Kind Regards, Florian