NSArray to va_list arguments and string format

gistfile1.m

- (NSString *)stringWithFormat:(NSString *)format args:(NSArray *)args
{
	NSMutableData *data = [NSMutableData dataWithLength:(sizeof(id) * args.count)];
	[args getObjects:(__unsafe_unretained id *)data.mutableBytes range:NSMakeRange(0, args.count)];
	NSString *so = [[NSString alloc] initWithFormat:format arguments:data.mutableBytes];
	return so;
}