Working with immutable array
Working with mutable and immutable arrays
Working with immutable Dictionary
Working with Mutable Dictionary Objects
Change comments
Working with Immutable Set objects
Working with mutable Set objects
Working with ordered set of numbers
Working with mutable ordered set objects
Working with counted set objects
Working with subscripting support on OLD NSMutableDictionary
Comment change
 OLD Array Subcripting support
 NEW Array Subcripting support