forum.dlang.org is now using DCaptcha

[Faux Amis via Digitalmars-d-announce]

This has to be a joke!

I couldn't answer a single question:

> What is the name of the D language syntax feature illustrated in the following fragment of D code?
>
> string a = x"5095 f9 95d723c2";
Seems like hex to me

> What is the name of the D language syntax feature illustrated in the following fragment of D code?
>
> /+ t = w * g; /+ t = 47; +/ +/
Those look like comments to me

> What is the name of the D language syntax feature illustrated in the following fragment of D code?
>
> auto h = new class C {};
Ah, finally one I understand. Wait, you want the name? No clue, have to 
look it up.

> What will be the return value of the following function?
>
> int b()
> {
>   return iota(29).reduce!max;
> }
iota.. yeah I have heard of it, never used it though.

CAPTCHAs: Simple for humans, difficult for computer; Or the other way 
around apparently.



On Tue 02/12/2014 22:41, Vladimir Panteleev wrote:
> I'm sure you all are as tired of the occasional spam that hits these
> lists as I was deleting it. (Mailing list users in particular, I guess,
> since we can't delete an email once it was sent out.) Most of the spam
> was coming in through the forum, so I suppose I was responsible for
> [not] keeping it out.
>
> Although forum.dlang.org has had a spam check and used reCAPTCHA since
> it was announced, it is only somewhat effective against fully-automated
> bots - it is powerless against humans paid to post spamverts on forums
> web-wide, which is what the current spam economy seems to be gravitating
> towards.
>
> Enter DCaptcha, a question-answer challenge tailored for D programmers.
> Its goals are to challenge posters of suspicious-looking content with
> questions that should be easy to answer to D programmers, and impossible
> for non-technical people with no incentive to learn or research stuff
> (i.e. spammers). DCaptcha is already in use on the D wiki
> (wiki.dlang.org), with great success - DCaptcha's debut cut the
> short-lived explosion in wiki spam to zero.
>
> For an idea of what sort of questions DCaptcha asks, you can demo it on
> the following page, so you don't have to clutter the forum with test posts:
>
> http://wiki.dlang.org/extensions/DCaptcha/demo.php
>
> Source code:
>
> https://github.com/CyberShadow/dcaptcha
>
> Pull requests for more challenges are welcome. You can find some goals
> for new challenges at the top of dcaptcha.d.
>
> Previous discussion (w.r.t. the D wiki):
>
> http://forum.dlang.org/post/tpflbvlfutjwyvqmowdx@forum.dlang.org