Repeted array ( same array as not changeble writted in changebles arrays)!?

Question

At time 3:12 the first Array ( changeble ) it is the same array mentioned in the notchangebles arrays ( the last one)?

Could you please clearify that :)

The array I mean is :

NSArray *nameArray [NSArray arrayWithObjects: @"Andrew", @"Kenneth", @"Craig", @"Kenneth", nil];

Thank you

Answer 1 · 2016-10-06T22:32:38Z

October 6, 2016 10:32pm

They are two separate definitions :

The first one declaring an NSArray which is an unchangeable array.

NSArray *nameArray = [NSArray arrayWithObjects: @"Andrew", @"Kenneth", @"Craig", @"Kenneth", nil];

The second one has two declarations one using the convenience constructor:
```
NSMutableArray *nameArray2 = [NSMutableArray arrayWithObjects: @"Andrew", @"Kenneth", @"Craig", @"Kenneth", nil];
```
Notice that the classname is NSMutableArray, mutable means that the array can be modified after declaration.
You can also declare it using the designated initializer:
```
NSMutableArray *nameArray3 = [[NSMutableArray alloc] initWithObjects: @"Andrew", @"Kenneth", @"Craig", @"Kenneth", nil];
```
Here we are using the alloc and init approach. Bot the declarations above has the same desired effect.

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