Multidimensionality of C type array and NSArray

Question

C type arrays can be defined as multidimensional. Is there a pendent for NSArrays?
Perhaps: declaring an NSArray with an instance variable which is itself a NSArray?

Answer 1

Sorry, my table wasn't really clear. I inserted spaces instead of tabs in the table which made the table unreadable. These spaces were removed automatically during sending my message. I couldn't find how to insert tabs in a message. Instead of writing an example in another language I send the table again - this time with the help of some dummy tabs (underscore character):
________________ array2 contains n array1: __________
__________ column1 _ column2 _ column3_ column4
array1.1 ___ a1.1.1 ___ a1.1.2 ___ a1.1.3 ___ a1.1.4
array1.2 ___ a1.2.1 ___ a1.2.2 ___ a1.2.3 ___ a1.2.4
array1.3 ___ a1.3.1 ___ a1.3.2 ___ a1.3.3 ___ a1.3.4
array1.n ___ a1.n.1 ___ a1.n.2 ___ a1.n.3 ___ a1.n.4
As said, I like to sort all arrays1 (array1.1 up to array1.n) contained in array2 according to column 3 without disturbing the order within arrays1. If this statement is perhaps too abstract I give an example. Suppose column3 contains the integers 3, 5, 1, 2:
________________ Old sort order of array 2 ___________
________________ array2 contains n array1: __________
__________ column1 _ column2 _ column3_ column4
array1.1 ___ a1.1.1 ___ a1.1.2 ______ 3 _____ a1.1.4
array1.2 ___ a1.2.1 ___ a1.2.2 ______ 5 _____ a1.2.4
array1.3 ___ a1.3.1 ___ a1.3.2 ______ 1 _____ a1.3.4
array1.n ___ a1.n.1 ___ a1.n.2 ______ 2 _____ a1.n.4
Sorting the arrays1.n in an ascending order should result in a newly sorted array2:
________________ New sort order of array 2 ___________
________________ array2 contains n array1: __________
__________ column1 _ column2 _ column3_ column4
array1.3 ___ a1.3.1 ___ a1.3.2 ______ 1 _____ a1.3.4
array1.n ___ a1.n.1 ___ a1.n.2 ______ 2 _____ a1.n.4
array1.1 ___ a1.1.1 ___ a1.1.2 ______ 3 _____ a1.1.4
array1.2 ___ a1.2.1 ___ a1.2.2 ______ 5 _____ a1.2.4
You are writing: "There are a number of sorting methods to use. I suggest the new sortedArrayUsingComparator. Just pass in a block that defines how you want the array sorted."
Unfortunately, I see my Cocoa kowledge is too weak until now, so I have to learn a lot more. I have vaguely heard about 'blocks' and I don't know the method 'sortedArrayUsingComparator'. Nonetheless, I hope that now my question/problem is clear.
Merci beaucoup pour votre patience
Gérard