Question

I need to create an array called BigArray. BigArray needs to contain words from below arrays.

There are three arrays called “users”. Each such array has certain words in it like:

Users1: Cat, Dog, Bat

Users2: Apple, Mango, Banana, Pear

Users3: Big, Small

I want to arrange above words in BigArray in following way:
Cat, Apple, Big, Dog, Mango, Small, Bat, Banana, Pear

How can I do that?

Answer 1

This solution will work even if your Userx arrays do not all have the same size:

NSMutableArray BigArray = [[NSMutableArray alloc] init];
NSMutableArray u1 = [Users1 mutableCopy];
NSMutableArray u2 = [Users2 mutableCopy];
NSMutableArray u3 = [Users3 mutableCopy];
while ([u1 count] || [u2 count] || [u3 count]) {
    if ([u1 count]) {
        [BigArray addObject:[u1 objectAtIndex:0]];
        [u1 removeObjectAtIndex:0];
    }
    if ([u2 count]) {
        [BigArray addObject:[u2 objectAtIndex:0]];
        [u2 removeObjectAtIndex:0];
    }
    if ([u3 count]) {
        [BigArray addObject:[u3 objectAtIndex:0]];
        [u3 removeObjectAtIndex:0];
    }
}
[u1 release];
[u2 release];
[u3 release];
/* BigArray now contains what you need */