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iOS Build a Blog Reader iPhone App Exploring the Master-Detail Template Modifying the Master-Detail Template

Posted by Nkem Modu
Nkem Modu
4,511 Points

Accessing an object in an array

Task 1 asked me to create the following array, which I did:

NSArray *booksArray = [NSArray arrayWithObjects: @"Hamlet", @"King Lear", @"Othello", "Macbeth",nil];

Task 2: asks me to "Create a string variable called 'bookTitle' and assign it the third item from the 'booksArray'". So I tried:

NSArray *booksArray = [NSArray arrayWithObjects: @"Hamlet", @"King Lear", @"Othello", "Macbeth",nil];  //line from task 1

NSString *bookTitle = booksArray[2];

I get a "Bummer! Try again!" error, so I replace the second line with:

NSString *bookTitle = [booksArray objectAtIndex:2];

Still getting the "Bummer! Try again!" error. If I change anything else though, I get an error which reads "Make sure you declare a string called 'bookTitle' and object in the array using the method 'objectAtIndex'."

3 Answers

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

Actually your code should not have worked. You forgot the @ on macbeth

NSArray *booksArray = [NSArray arrayWithObjects: @"Hamlet", @"King Lear", @"Othello", "Macbeth",nil];

looks like thats a bug in the challenge engine if it let that through on the first task. Amit Bijlani can you look into this bug? I took the challenge again and it does let that syntax error slip through on the first task, and then catches it on the second task.

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

your code looks like it should have worked. I just passed with:

NSArray *booksArray = [NSArray arrayWithObjects:@"Hamlet", @"King Lear", @"Othello", @"Macbeth", nil];

NSString *bookTitle = [booksArray objectAtIndex:2];
Nkem Modu
Nkem Modu
4,511 Points
Nkem Modu
Nkem Modu
4,511 Points

Ha thanks man.

Just because a line of code passes task #1 doesn't guarantee that the same line will pass task #2. Lesson learned.

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

well normally it does. The engine should not have let that through with that syntax error.