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iOS Objective-C Basics (Retired) Foundation Framework NSDictionary

Posted by Andrew Hawkins
Andrew Hawkins
13,213 Points

NSDictionary Challenge Problem with adding 'year' key

Any suggestions?

Challenge question: Let's add the year of the album to the 'albumMutable' variable. Where the key is a NSString 'year' and the value is also a NSString '1969'.

Error: Bummer! The year set is not the correct value.

Code:

NSDictionary *album = @{ @"title":@"Abbey Road", @"artist":@"The Beatles" }; NSMutableDictionary *albumMutable = [NSMutableDictionary dictionaryWithDictionary:album]; [albumMutable setObject:@1969 forKey:@"year"];

3 Answers

Fernando Claussen
Fernando Claussen
9,324 Points

You forgot the " " around 1969. Remember, it's an NSString.

Rodrigo Chousal
Rodrigo Chousal
16,009 Points
Rodrigo Chousal
Rodrigo Chousal
16,009 Points

You might want to try this instead:

NSDictionary *album = @{ @"title":@"Abbey Road", @"artist":@"The Beatles" }; NSMutableDictionary *albumMutable = [NSMutableDictionary dictionaryWithDictionary:album]; [albumMutable setObject:@"1969" forKey:@"year"];

I believe you only missed writing the quotations in @"1969", since the instructions specified: The value is also an NSString '1969'.

Andrew Hawkins
Andrew Hawkins
13,213 Points
Andrew Hawkins
Andrew Hawkins
13,213 Points

Awesome. So close yet so far. Thanks.