What is an easy way to break an NSArray with 4000+ objects in it into multiple arrays with 30 objects each?

Question

What is an easy way to break an NSArray with 4000 objects in it into multiple arrays with 30 objects each?

So right now I have an NSArray *stuff where [stuff count]

Answer 1

Off the top of my head, something like (untested):

NSMutableArray *arrayOfArrays = [NSMutableArray array];

int itemsRemaining = [stuff count];
int j = 0;

while(itemsRemaining) {
    NSRange range = NSMakeRange(j, MIN(30, itemsRemaining));
    NSArray *subarray = [stuff subarrayWithRange:range];
    [arrayOfArrays addObject:subarray];
    itemsRemaining-=range.length;
    j+=range.length;
}

The MIN(30, i) takes care of that last array that won't necessarily have 30 items in it.