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Code Challenge: Create an NSMutableArray object called 'elements'.

The challenge is asking to to Create an NSMutableArray object called 'elements'.

I tried to create an NSMutableArray object by typing this into the editor: NSMutableArray *elements;

The code challenge editor says I made a mistake, but the code works just fine in Xcode.

Does anyone have any idea what went wrong?


2 Answers

Stefan Bjornsson
Stefan Bjornsson
3,362 Points

For the first task I have tried the 3 following lines of code that does not pass: NSMutableArray *elements; NSMutableArray *elements = [[NSMutableArray alloc] init]; NSMutableArray *elements = [[NSMutableArray alloc] initWithCapacity: 0];

When pushing the preview button I rarely see any display of errors through out this course it usually display blank white space, is it possible to fix that?

Amit Bijlani
Amit Bijlani
Treehouse Guest Teacher

Try: NSMutableArray *elements = [NSMutableArray array];

Brayden Kness
Brayden Kness
12,492 Points

Did you do @property (strong, nonatomic) NSMutableArray *elements; ?

Not possible since there's no header file.