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Start your free trialemmanuelnabagabo
4,744 PointsWhat is wrong with the second step????
I checked all possible ways but it does not allow me to pass.
using Treehouse.Models;
namespace Treehouse.Data
{
public class VideoGamesRepository
{
// TODO Add GetVideoGames method
public VideoGame[] GetVideoGames()
{
return _videoGames;
}
// TODO Add GetVideoGame method
public VideoGame GetVideoGame(int id)
{
var videoGameToReturn = new VideoGame();
foreach(var videoGame in _videoGames)
{
if(videoGame.Id == id)
{
videoGameToReturn = videoGame;
break;
}
}
return videoGameToReturn;
}
private static VideoGame[] _videoGames = new VideoGame[]
{
new VideoGame()
{
Id = 1,
Title = "Super Mario 64",
Description = "Super Mario 64 is a 1996 platform video game developed and published by Nintendo for the Nintendo 64.",
Characters = new string[]
{
"Mario",
"Princess Peach",
"Bowser",
"Toad",
"Yoshi"
},
Publisher = "Nintendo",
Favorite = true
},
new VideoGame()
{
Id = 2,
Title = "Mario Kart 64",
Description = "Mario Kart 64 is a 1996 go-kart racing game developed and published by Nintendo for the Nintendo 64 video game console.",
Characters = new string[]
{
"Mario",
"Princess Peach",
"Bowser",
"Toad",
"Yoshi"
},
Publisher = "Nintendo",
Favorite = false
}
};
}
}
namespace Treehouse.Models
{
// Don't make any changes to this class!
public class VideoGame
{
public int Id { get; set; }
public string Title { get; set; }
public string Description { get; set; }
public string[] Characters { get; set; }
public string Publisher { get; set; }
public bool Favorite { get; set; }
public string DisplayText
{
get
{
return Title + " (" + Publisher + ")";
}
}
}
}
2 Answers
andren
28,558 PointsYour code is technically fine, and the error message the task gives is quite misleading. The reason why it does not accept your code is that if an invalid id is passed in your code returns an empty VideoGame
object. The challenge expects the method to return null
if no VideoGame
object is found.
The challenge does not explicitly state this, but that is the value used in a similar method in a previous lecture. And it is pretty common to return null
when a method like this does not find what is asked for. When a VideoGame
object is returned both when an Id is found and when it is not, it becomes harder to know whether the method succeed or not.
So if you change the initial value of the videoGameToReturn
variable to null
and specify that it is a VideoGame
variable (since var
cannot determine the right type when null
is used) like this:
public VideoGame GetVideoGame(int id)
{
VideoGame videoGameToReturn = null; // Initialize with null and specify type as VideoGame
foreach(VideoGame videoGame in _videoGames)
{
if(videoGame.Id == id)
{
videoGameToReturn = videoGame;
break;
}
}
return videoGameToReturn;
}
Then your code will be accepted.
emmanuelnabagabo
4,744 PointsAndren, Thank you!