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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