gistfile1.txt

- (NSString *)hashForObject:(NSObject*)object {
    // Archive data
    NSData *d = [NSKeyedArchiver archivedDataWithRootObject: object];
    
    // Create MD5
    unsigned char md5Buffer[CC_MD5_DIGEST_LENGTH];
    CC_MD5(d.bytes, d.length, md5Buffer);
    NSMutableString *output = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH * 2];
    for(int i = 0; i < CC_MD5_DIGEST_LENGTH; i++)
    [output appendFormat:@"%02x",md5Buffer[i]];
    return output;
}