NSArray create with some elements plus another NSArray

Question

I am trying to use model inheritance on realm. So I minded up using the code below to override and also call super method.

+ (NSArray *)requiredProperties {
    return @[[super requiredProperties], @"thisIsRequired",@"thisIsAlsoRequired"];
}

So the question: is it OK to create an NSArray on the fly while also using another NSArray and some more elements:

NSArray *mySecondArray = @[myFirstArray, @"andSomeExtras", @"alsoMoreExtras"];

What I have been expecting is; first element of mySecondArray should be the first element of myFirstArray. Second element of mySecondArray should be the second element of myFirstArray and so on. (size of myFirstArray) +1 th element of mySecondArray should be @"thisIsRequired" .

Or I am making up some kind of magix?

Well, as you can see I am new to the stuff and I might be confused.

Answer 1

In general, it is okay to instantiate such heterogeneous arrays with Foundation. It's just not what you want here. In your example, you would end up with the following instead:

NSArray *myFirstArray = @[@"firstsFirstsElement", @"firstsSecondElement"];
NSArray *mySecondArray = @[myFirstArray, @"andSomeExtras", @"alsoMoreExtras"];
/* => 
@[
  @[@"firstsFirstsElement", @"firstsSecondElement"],
  @"andSomeExtras",
  @"alsoMoreExtras",
]
*/

You're looking for - arrayByAddingObjectsFromArray:. You can use it like seen below:

+ (NSArray *)requiredProperties {
    return [super.requiredProperties arrayByAddingObjectsFromArray:@[
         @"thisIsRequired",
         @"thisIsAlsoRequired",
    ]];
}