CodeSnippet.mm

-(void)doCodeSnippetWithCompletion:(void(^)())block{
    //dispatching to background queue
   dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{
       NSString *code = @"Code", *test = @"Test";
       BOOL iterationPrinted = NO;
       for (int x = 1; x<=100; x++) {
           iterationPrinted = NO;
           if(x % 3 == 0 && x % 5 == 0)
               NSLog(@"%@%@",code,test);
           else if(x % 5 == 0)
               NSLog(@"%@",test);
           else if(x % 3 == 0)
               NSLog(@"%@",code);
           else
               NSLog(@"%d",x);
       }
       if(block) //completion callback (optional)
           block();
   });
}