Re: Article: the feature that makes D my favorite programming language
On Saturday, 25 July 2020 at 16:22:52 UTC, H. S. Teoh wrote:
On Sat, Jul 25, 2020 at 01:28:34PM +, Adam D. Ruppe via
Digitalmars-d-announce wrote:
On Saturday, 25 July 2020 at 11:12:16 UTC, aberba wrote:
> Oop! Chaining the writeln too could have increased the wow
> factor. I didn't see that.
oh I hate it when people do that though, it just looks off to
me at that point.
Me too. It gives me the same creepie-feelies as when people
write
writeln(x) as:
writeln = x;
Actually, D's lax syntax surrounding the = operator gives rise
to the following reverse-UFCS nastiness:
// Cover your eyes (unless you're reverse-Polish :-P)! and
don't
// do this at home, it will corrupt your sense of good coding
// style!
import std;
void main() {
writeln = filter!(x => x % 3 == 1)
= map!(x => x*2)
= [ 1, 2, 3, 4, 5, 6 ];
}
// Output: [4, 10]
T
Oh my god ... it’s like haskells $ 樂
Why is this allowed?
I mean, ok, it was probably done to allow property syntax. But
how did this end up being applied to every function?
Can this be fixed?
Re: Article: the feature that makes D my favorite programming language
I find something like writable.writeTo(stdout) nicer
Re: Article: the feature that makes D my favorite programming language
On Sunday, 26 July 2020 at 01:14:53 UTC, Paul Backus wrote: On Saturday, 25 July 2020 at 18:24:22 UTC, Jesse Phillips wrote: On Saturday, 25 July 2020 at 14:47:01 UTC, aberba wrote: [...] It bugs me too, though I have done it. I think the right answer of why it is odd is because writeln is void. As soon as it is placed on the end the chain is broken and you can't expand on it. This is no different from any other "sink" that consumes a range: someSource .map!foo .filter!bar .splitter(baz) .each!quux; `each` returns void [1], so using it ends the chain. But that's not a problem, because the whole *point* of using `each` is to consume the range. [1] Not exactly, but close enough. I believe one can use tee!(writeln) to avoid consuming the range.
Re: Article: the feature that makes D my favorite programming language
On Saturday, 25 July 2020 at 18:24:22 UTC, Jesse Phillips wrote: On Saturday, 25 July 2020 at 14:47:01 UTC, aberba wrote: On Saturday, 25 July 2020 at 13:28:34 UTC, Adam D. Ruppe wrote: On Saturday, 25 July 2020 at 11:12:16 UTC, aberba wrote: Oop! Chaining the writeln too could have increased the wow factor. I didn't see that. oh I hate it when people do that though, it just looks off to me at that point. Ha ha. If you're writing idiomatic D code, why not not all in on it? It bugs me too, though I have done it. I think the right answer of why it is odd is because writeln is void. As soon as it is placed on the end the chain is broken and you can't expand on it. This is no different from any other "sink" that consumes a range: someSource .map!foo .filter!bar .splitter(baz) .each!quux; `each` returns void [1], so using it ends the chain. But that's not a problem, because the whole *point* of using `each` is to consume the range. [1] Not exactly, but close enough.
Re: Article: the feature that makes D my favorite programming language
On 7/25/20 7:47 AM, aberba wrote: > On Saturday, 25 July 2020 at 13:28:34 UTC, Adam D. Ruppe wrote: >> oh I hate it when people do that though, it just looks off to me at >> that point. > > Ha ha. If you're writing idiomatic D code, why not not all in on it? I agree with Adam and others on this. My reasoning is, writeln's first parameter is not special compared to its other parameters. In other words, I can't see writeln as a special operation on its first argument. Except, when there is just one thing... Meh... I don't like it. :) Ali
Re: Article: the feature that makes D my favorite programming language
On Saturday, 25 July 2020 at 14:47:01 UTC, aberba wrote: On Saturday, 25 July 2020 at 13:28:34 UTC, Adam D. Ruppe wrote: On Saturday, 25 July 2020 at 11:12:16 UTC, aberba wrote: Oop! Chaining the writeln too could have increased the wow factor. I didn't see that. oh I hate it when people do that though, it just looks off to me at that point. Ha ha. If you're writing idiomatic D code, why not not all in on it? It bugs me too, though I have done it. I think the right answer of why it is odd is because writeln is void. As soon as it is placed on the end the chain is broken and you can't expand on it.
Re: Article: the feature that makes D my favorite programming language
On Sat, Jul 25, 2020 at 01:28:34PM +, Adam D. Ruppe via
Digitalmars-d-announce wrote:
> On Saturday, 25 July 2020 at 11:12:16 UTC, aberba wrote:
> > Oop! Chaining the writeln too could have increased the wow factor. I
> > didn't see that.
>
> oh I hate it when people do that though, it just looks off to me at
> that point.
Me too. It gives me the same creepie-feelies as when people write
writeln(x) as:
writeln = x;
Actually, D's lax syntax surrounding the = operator gives rise to the
following reverse-UFCS nastiness:
// Cover your eyes (unless you're reverse-Polish :-P)! and don't
// do this at home, it will corrupt your sense of good coding
// style!
import std;
void main() {
writeln = filter!(x => x % 3 == 1)
= map!(x => x*2)
= [ 1, 2, 3, 4, 5, 6 ];
}
// Output: [4, 10]
T
--
Winners never quit, quitters never win. But those who never quit AND never win
are idiots.
Re: Article: the feature that makes D my favorite programming language
On Saturday, 25 July 2020 at 13:28:34 UTC, Adam D. Ruppe wrote: On Saturday, 25 July 2020 at 11:12:16 UTC, aberba wrote: Oop! Chaining the writeln too could have increased the wow factor. I didn't see that. oh I hate it when people do that though, it just looks off to me at that point. Ha ha. If you're writing idiomatic D code, why not not all in on it?
Re: Article: the feature that makes D my favorite programming language
On Saturday, 25 July 2020 at 11:12:16 UTC, aberba wrote: Oop! Chaining the writeln too could have increased the wow factor. I didn't see that. oh I hate it when people do that though, it just looks off to me at that point.
Re: Article: the feature that makes D my favorite programming language
On Saturday, 25 July 2020 at 10:22:53 UTC, Andre Pany wrote:
On Friday, 24 July 2020 at 20:34:17 UTC, aberba wrote:
Wrote something on the feature that makes D my favorite
programming language
https://opensource.com/article/20/7/d-programming
Great article. I assume you didn't chained writeln by purpose,
same for import std?
```
import std;
int[] evenNumbers(int[] numbers)
{
return numbers.filter!(n => n % 2 == 0).array;
}
void main()
{
[1, 2, 3, 4].evenNumbers.writeln;
}
```
Kind regards
Andre
Oop! Chaining the writeln too could have increased the wow
factor. I didn't see that.
Re: Article: the feature that makes D my favorite programming language
On Friday, 24 July 2020 at 20:34:17 UTC, aberba wrote:
Wrote something on the feature that makes D my favorite
programming language
https://opensource.com/article/20/7/d-programming
Great article. I assume you didn't chained writeln by purpose,
same for import std?
```
import std;
int[] evenNumbers(int[] numbers)
{
return numbers.filter!(n => n % 2 == 0).array;
}
void main()
{
[1, 2, 3, 4].evenNumbers.writeln;
}
```
Kind regards
Andre
Re: Article: the feature that makes D my favorite programming language
On Friday, 24 July 2020 at 21:18:37 UTC, Steven Schveighoffer wrote: On 7/24/20 4:34 PM, aberba wrote: Wrote something on the feature that makes D my favorite programming language https://opensource.com/article/20/7/d-programming Nice! You could make this more dramatic. I'm sure you just "did it automatically", but you used UFCS in your function implementation as well! return numbers.filter!(n => n % 2 == 0).array; Without UFCS, this really should be written: array(filter!(n => n % 2 == 0)(numbers)); If you use that in the first boring non-UFCS version, then I think the wow factor goes up ;) Someone said something similar in the comments . -Steve
Re: Article: the feature that makes D my favorite programming language
On Friday, 24 July 2020 at 21:19:28 UTC, H. S. Teoh wrote: On Fri, Jul 24, 2020 at 08:34:17PM +, aberba via Digitalmars-d-announce wrote: Wrote something on the feature that makes D my favorite programming language https://opensource.com/article/20/7/d-programming Nitpick: evenNumbers doesn't need to return int[]. In fact, dropping the .array makes it even better because it avoids an unnecessary allocation when you're not going to store the array -- writeln is well able to handle printing arbitrary ranges. Let the caller call .array when he wishes the store the array; if it's transient, omitting .array saves an allocation. T Yeah, you're right.
Re: Article: the feature that makes D my favorite programming language
On 7/24/20 4:34 PM, aberba wrote: Wrote something on the feature that makes D my favorite programming language https://opensource.com/article/20/7/d-programming Nice! You could make this more dramatic. I'm sure you just "did it automatically", but you used UFCS in your function implementation as well! return numbers.filter!(n => n % 2 == 0).array; Without UFCS, this really should be written: array(filter!(n => n % 2 == 0)(numbers)); If you use that in the first boring non-UFCS version, then I think the wow factor goes up ;) -Steve
Re: Article: the feature that makes D my favorite programming language
On Fri, Jul 24, 2020 at 08:34:17PM +, aberba via Digitalmars-d-announce wrote: > Wrote something on the feature that makes D my favorite programming > language > > https://opensource.com/article/20/7/d-programming Nitpick: evenNumbers doesn't need to return int[]. In fact, dropping the .array makes it even better because it avoids an unnecessary allocation when you're not going to store the array -- writeln is well able to handle printing arbitrary ranges. Let the caller call .array when he wishes the store the array; if it's transient, omitting .array saves an allocation. T -- Nearly all men can stand adversity, but if you want to test a man's character, give him power. -- Abraham Lincoln
Re: Article: the feature that makes D my favorite programming language
On Friday, 24 July 2020 at 20:34:17 UTC, aberba wrote: Wrote something on the feature that makes D my favorite programming language https://opensource.com/article/20/7/d-programming An interesting article, excellent job
Article: the feature that makes D my favorite programming language
Wrote something on the feature that makes D my favorite programming language https://opensource.com/article/20/7/d-programming
