On Wednesday, 3 December 2014 at 21:26:19 UTC, ketmar via Digitalmars-d-announce wrote:
> On Wed, 03 Dec 2014 20:22:31 +0000
> Vladimir Panteleev via Digitalmars-d-announce
> <digitalmars-d-announce@puremagic.com> wrote:
>
>> On Wednesday, 3 December 2014 at 20:19:34 UTC, ketmar via Digitalmars-d-announce wrote:
>> > On Wed, 03 Dec 2014 14:47:09 +0100
>> > Jacob Carlborg via Digitalmars-d-announce
>> > <digitalmars-d-announce@puremagic.com> wrote:
>> >> auto u = new class M {};
>> >> 
>> >> Exactly what is referred to here? The type inference or the anonymous class? The answer is "anonymous class".
>> > besides, it's not "anonymous", it has a name!
>> 
>> The type is anonymous.
> so what that "M" after `class` means then? anonymous with a name,
> that's cool! ;-)

That's the name of the parent class :)

On Wednesday, 3 December 2014 at 13:02:35 UTC, Martin Krejcirik wrote:
> I think all code fragments should have just one exact answer (like number or single word) a any programmer without specific D knowledge should be able to answer them correctly. Asking for D feature names in not good IMHO.

I agree.

Matheus.

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

On Tuesday, 2 December 2014 at 21:41:28 UTC, Vladimir Panteleev wrote:
> 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.

Coincidence? :)

http://googleonlinesecurity.blogspot.com.br/2014/12/are-you-robot-introducing-no-captcha.html

Matheus.

On Wednesday, 3 December 2014 at 19:42:39 UTC, Ary Borenszweig wrote:
> On 12/2/14, 6:41 PM, Vladimir Panteleev wrote:
>
>> Enter DCaptcha
>
> I think this could work with just two or three variants of a question. Always ask what's the return value of the function.
>
> 1. int foo() { return 8 % 3; }
>
> I don't think non-programmers know what that '%' symbol is, but programmers of any language would recognize this.
>
> 2. int foo() { int x = 8; x++; x++; return x; }
>
> I don't think non-programmers would guess ++ is increment, but programmers most probably know it.
>
> 3. bool foo() { return 42 != 30 };
>
> I don't think non-programmers know what "!=" is.

I had to maintain a technical forum last year that was getting spammed like crazy.  I added the question "how many bits are in a byte?", and the spam vanished.  Based on that experience, I think the bar can be set very low.

I prefer something like the examples above.  Honestly, I don't know what the names of many syntax features are, but I usually know how to use and interpret them.  But, one positive side effect of this is that if I ever do get challenged with a "what is the name of this feature?" question, I will finally be motivated to go look it up.

Mike

On Thursday, 4 December 2014 at 04:02:49 UTC, Mike wrote:
> On Wednesday, 3 December 2014 at 19:42:39 UTC, Ary Borenszweig wrote:
>> On 12/2/14, 6:41 PM, Vladimir Panteleev wrote:
>
>...

> I had to maintain a technical forum last year that was getting spammed like crazy.  I added the question "how many bits are in a byte?", and the spam vanished.  Based on that experience, I think the bar can be set very low.
>

Surely you mean "how many bits in an octet" ;-)

> I prefer something like the examples above.  Honestly, I don't know what the names of many syntax features are, but I usually know how to use and interpret them.  But, one positive side effect of this is that if I ever do get challenged with a "what is the name of this feature?" question, I will finally be motivated to go look it up.
>
> Mike

On Thu, 04 Dec 2014 04:02:46 +0000
Mike via Digitalmars-d-announce <digitalmars-d-announce@puremagic.com>
wrote:

> I had to maintain a technical forum last year that was getting spammed like crazy.  I added the question "how many bits are in a byte?"
six. am i failed?

On 4/12/2014 8:13 p.m., ketmar via Digitalmars-d-announce wrote:
> On Thu, 04 Dec 2014 04:02:46 +0000
> Mike via Digitalmars-d-announce <digitalmars-d-announce@puremagic.com>
> wrote:
>
>> I had to maintain a technical forum last year that was getting
>> spammed like crazy.  I added the question "how many bits are in a
>> byte?"
> six. am i failed?

Google is your friend.

https://www.google.co.nz/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=1+byte+to+bits

On 2014-12-03 23:39, Vladimir Panteleev wrote:

> That's the name of the parent class :)

Or interface, if I recall correctly.

-- 
/Jacob Carlborg

On Thu, 04 Dec 2014 20:31:47 +1300
Rikki Cattermole via Digitalmars-d-announce
<digitalmars-d-announce@puremagic.com> wrote:

> On 4/12/2014 8:13 p.m., ketmar via Digitalmars-d-announce wrote:
> > On Thu, 04 Dec 2014 04:02:46 +0000
> > Mike via Digitalmars-d-announce <digitalmars-d-announce@puremagic.com>
> > wrote:
> >
> >> I had to maintain a technical forum last year that was getting spammed like crazy.  I added the question "how many bits are in a byte?"
> > six. am i failed?
> 
> Google is your friend.
why not Knuth? Knuth is my friend, and MIX byte is of 6 bits.