objc.m

#import <Cocoa/Cocoa.h>

int main(){
	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
	NSArray * array = [NSArray arrayWithObjects:
				      [NSNumber numberWithInt:333],
				      [NSNumber numberWithInt:555],
				      [NSNumber numberWithInt:444],
				      [NSNumber numberWithInt:222],
				      [NSNumber numberWithInt:111],
				      nil];
	
	int min = [[array valueForKeyPath:@"@min.intValue"] intValue];
	int max = [[array valueForKeyPath:@"@max.intValue"] intValue];
	NSLog(@"min = %d", min);
	NSLog(@"max = %d", max);

	NSUInteger minIndex = [array indexOfObject:[NSNumber numberWithInt:min]];
	NSUInteger maxIndex = [array indexOfObject:[NSNumber numberWithInt:max]];
	NSLog(@"minIndex = %d", minIndex);
	NSLog(@"maxIndex = %d", maxIndex);

	[pool release];
	return 0;
}