1#import <Foundation/Foundation.h> 2 3int main (int argc, const char * argv[]) 4{ 5 6 NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; 7 8 NSSet* set = [NSSet setWithArray:@[@1,@"hello",@2,@"world"]]; 9 NSMutableSet* mutable = [NSMutableSet setWithCapacity:5]; 10 [mutable addObject:@1]; 11 [mutable addObject:@2]; 12 [mutable addObject:@3]; 13 [mutable addObject:@4]; 14 [mutable addObject:@5]; 15 [mutable addObject:[NSURL URLWithString:@"www.apple.com"]]; 16 [mutable addObject:@[@1,@2,@3]]; 17 [mutable unionSet:set]; 18 [mutable removeAllObjects]; // Set break point at this line. 19 [mutable unionSet:set]; 20 [mutable addObject:@1]; 21 22 [pool drain]; 23 return 0; 24} 25 26