all tasks

Task/Symmetric-difference/Objective-C/symmetric-difference.m

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+NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
+
+NSSet* setA = [NSSet setWithObjects:@"John", @"Serena", @"Bob", @"Mary", @"Serena", nil];
+NSSet* setB = [NSSet setWithObjects:@"Jim", @"Mary", @"John", @"Jim", @"Bob", nil];
+
+// Present our initial data set
+NSLog(@"In set A: %@", setA);
+NSLog(@"In set B: %@", setB);
+
+// Get our individual differences.
+NSMutableSet* notInSetA = [NSMutableSet setWithSet:setB];
+[notInSetA minusSet:setA];
+NSMutableSet* notInSetB = [NSMutableSet setWithSet:setA];
+[notInSetB minusSet:setB];
+
+// The symmetric difference is the concatenation of the two individual differences
+NSMutableSet* symmetricDifference = [NSMutableSet setWithSet:notInSetA];
+[symmetricDifference unionSet:notInSetB];
+
+// Present our results
+NSLog(@"Not in set A: %@", notInSetA);
+NSLog(@"Not in set B: %@", notInSetB);
+NSLog(@"Symmetric Difference: %@", symmetricDifference);
+
+[pool drain];