NSMutableArray insertObject atIndex

Question

I have NSMutableArray *myArray = nil; . If I will use [myArray insertObject:@"Hello" atIndex:0] method to this array, will it be allocated automatically?

Answer 1

No. It will just send the message to nil.

It would be equivalent to;

[nil insertObject:@"Hello" atIndex:0];

Answer 2

NSMutableArray *nil = [NSMutableArray alloc]init];

[nil insertObject:@"How" atIndex:0];

Answer 3

Nope. Objective-C lets you message nil, so [myArray insertObject:@"Hello" atIndex:0] becomes [nil insertObject:@"Hello" atIndex:0] and will take the fast path in the runtime to doing nothing.