Now #5 on the front page of https://news.ycombinator.com/news

The page being discussed:

https://p0nce.github.io/d-idioms/

and on reddit:

https://www.reddit.com/r/programming/comments/lhssjp/idioms_for_the_d_programming_language/

On Thu, Feb 11, 2021 at 12:12:36PM -0800, Walter Bright via Digitalmars-d-announce wrote: [...]
> https://p0nce.github.io/d-idioms/

Not bad, but it seems to be missing some of the newer idioms. Like the templated static this trick for transparently encoding compile-time information at runtime.  For example:

	import std.regex;
	void main(string[] args) {
		foreach (arg; args) {
			if (arg.match(Re!`some.*regex(pattern)+`)) {
				... // do something
			}
		}
	}

	template Re(string reStr) {
		Regex!char re;
		static struct Impl {
			static this() {
				re = regex(reStr);
			}
		}
		string Re() { return re; }
	}

The Re template captures the regex string at compile-time and injects it into Impl's static this(), which compiles the regex at program startup at runtime, then the eponymous function Re() simply returns the precompiled value.

The result:
- Regexes are automatically picked up at compile-time;
- But expensive compile-time generation of the regex (which consumes
  lots of compiler memory and slows down compilation) is skipped;
- Compilation of the regex happens only once upon program startup and
  cached, and thereafter is a simple global variable lookup.
- Multiple occurrences of the Re template with the same regex is
  automatically merged (because it's the same instantiation of the
  template).

D features used:
- compile-time string parameters
- static this()
- eponymous templates
- reuse of template instantiations that have the same arguments


[...]
> https://www.reddit.com/r/programming/comments/lhssjp/idioms_for_the_d_programming_language/

There doesn't appear to be any discussion happening here.


T

-- 
If it breaks, you get to keep both pieces. -- Software disclaimer notice

On Thursday, 11 February 2021 at 20:12:36 UTC, Walter Bright wrote:
> Now #5 on the front page of https://news.ycombinator.com/news

I've gotten Dlang to the frontpage of HN 3 other times:


Specification for the D Programming Language https://news.ycombinator.com/item?id=21993208
D 2.0.93.0 https://news.ycombinator.com/item?id=23859448
Ask HN: Why do you use Rust, when D is available? https://news.ycombinator.com/item?id=23494490

If you have any particularly interesting and specific pages on D, feel free to send them to me, so I can post them to HN at the optimal time. (Furthermore, if you authored it, you should a comment that explains why you made it and offering to answer questions– I have found this can turn a regular post into a frontpage post.)

On Thursday, 11 February 2021 at 20:12:36 UTC, Walter Bright wrote:
> Now #5 on the front page of https://news.ycombinator.com/news
>
> The page being discussed:
>
> https://p0nce.github.io/d-idioms/
>
> and on reddit:
>
> https://www.reddit.com/r/programming/comments/lhssjp/idioms_for_the_d_programming_language/

👍

On 2/11/2021 5:53 PM, James Lu wrote:
> On Thursday, 11 February 2021 at 20:12:36 UTC, Walter Bright wrote:
>> Now #5 on the front page of https://news.ycombinator.com/news
> 
> I've gotten Dlang to the frontpage of HN 3 other times:
> 
> 
> Specification for the D Programming Language https://news.ycombinator.com/item?id=21993208
> D 2.0.93.0 https://news.ycombinator.com/item?id=23859448
> Ask HN: Why do you use Rust, when D is available? https://news.ycombinator.com/item?id=23494490

Thank you!

> If you have any particularly interesting and specific pages on D, feel free to send them to me, so I can post them to HN at the optimal time. (Furthermore, if you authored it, you should a comment that explains why you made it and offering to answer questions– I have found this can turn a regular post into a frontpage post.)

Yes, having the author do an AMA is very productive.

On Friday, 12 February 2021 at 00:26:09 UTC, H. S. Teoh wrote:
> On Thu, Feb 11, 2021 at 12:12:36PM -0800, Walter Bright via Digitalmars-d-announce wrote: [...]
>> https://p0nce.github.io/d-idioms/
>
> Not bad, but it seems to be missing some of the newer idioms.

It's because I lack the time to update it. It was always a page to let _me_ understand the language better, and then I got to a point where I wasn't following the D development enough.

On Friday, 12 February 2021 at 11:19:26 UTC, Guillaume Piolat wrote:
> On Friday, 12 February 2021 at 00:26:09 UTC, H. S. Teoh wrote:
>> On Thu, Feb 11, 2021 at 12:12:36PM -0800, Walter Bright via Digitalmars-d-announce wrote: [...]
>>> https://p0nce.github.io/d-idioms/
>>
>> Not bad, but it seems to be missing some of the newer idioms.
>
> It's because I lack the time to update it. It was always a page to let _me_ understand the language better, and then I got to a point where I wasn't following the D development enough.

For someone coming to D today, would you say most of the content there is still valid?

Thanks

On Friday, 12 February 2021 at 11:44:31 UTC, Imperatorn wrote:
> On Friday, 12 February 2021 at 11:19:26 UTC, Guillaume Piolat wrote:
>> On Friday, 12 February 2021 at 00:26:09 UTC, H. S. Teoh wrote:
>>> On Thu, Feb 11, 2021 at 12:12:36PM -0800, Walter Bright via Digitalmars-d-announce wrote: [...]
>>>> https://p0nce.github.io/d-idioms/
>>>
>>> Not bad, but it seems to be missing some of the newer idioms.
>>
>> It's because I lack the time to update it. It was always a page to let _me_ understand the language better, and then I got to a point where I wasn't following the D development enough.
>
> For someone coming to D today, would you say most of the content there is still valid?
>
> Thanks

It's mostly valid, but it lacks about fifty new articles that would need to be added.

On Friday, 12 February 2021 at 12:25:32 UTC, Guillaume Piolat wrote:
>
> It's mostly valid, but it lacks about fifty new articles that would need to be added.

Also keep in mind it's not a structured learning resource, it was all about emphasizing this or that particular and rarely needed aspect of D and edge cases. Which I think a few of us have been fond of at one point.

On Friday, 12 February 2021 at 08:31:13 UTC, Walter Bright wrote:
>
> Yes, having the author do an AMA is very productive.

I'm literally busy writing D!