ObjFW  Diff

	return [self objectAtIndex: idx];
}

- (id)valueForKey: (OFString *)key
{
	id ret;

	if ([key hasPrefix: @"@"]) {
		void *pool = objc_autoreleasePoolPush();

		key = [key substringWithRange: of_range(1, key.length - 1)];
		ret = [[super valueForKey: key] retain];

		objc_autoreleasePoolPop(pool);

		return [ret autorelease];
	}

	ret = [OFMutableArray arrayWithCapacity: self.count];

	for (id object in self) {
		id value = [object valueForKey: key];

		if (value == nil)
			value = [OFNull null];

		[ret addObject: value];
	}

	[ret makeImmutable];

	return ret;
}

- (void)setValue: (id)value
	  forKey: (OFString *)key
{
	if ([key hasPrefix: @"@"]) {
		void *pool = objc_autoreleasePoolPush();

		key = [key substringWithRange: of_range(1, key.length - 1)];
		[super setValue: value
			 forKey: key];

		objc_autoreleasePoolPop(pool);
		return;
	}

	for (id object in self)
		[object setValue: value
			  forKey: key];
}

- (size_t)indexOfObject: (id)object
{