giveSomeGifts

giveSomeGifts

void giveGifts(int iteration) {
    NSArray *people = @[@"a", @"b", @"c", @"d", @"e"];
    NSMutableArray *given = [NSMutableArray array];
    NSMutableArray *received = [NSMutableArray array];
    
    int count = 0; //we don't accidentally want an infinate loop
    while (people.count != given.count && people.count != received.count && count < 2000) {
        int a = arc4random_uniform((int32_t)people.count);
        int b = arc4random_uniform((int32_t)people.count);
        
        BOOL aHasGiven = [given containsObject:people[a]];
        BOOL bHasReceived = [received containsObject:people[b]];
        BOOL bHasGiven = [given containsObject:people[b]];
        if(a != b)
        {
            if(!aHasGiven && ((!bHasReceived && !bHasGiven) || (!bHasReceived && given.count < people.count)) )
            {
                [given addObject:people[a]];
                [received addObject:people[b]];
            }
        }
        
        count++;
    }
    
    NSLog(@"\niteration: %d\ncount: %d \ng:%@ \nr:%@", iteration, count, given, received);
}

void giveSomeGifts()
{
    for(int i = 0; i < 10; i++)
        giveGifts(i);
}