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Article: the feature that makes D my favorite programming language
Jul 24
aberba
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July 24
Wrote something on the feature that makes D my favorite programming language

https://opensource.com/article/20/7/d-programming
July 24
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
July 24
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
July 24
On Fri, Jul 24, 2020 at 08:34:17PM +0000, 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
July 24
On Friday, 24 July 2020 at 21:19:28 UTC, H. S. Teoh wrote:
> On Fri, Jul 24, 2020 at 08:34:17PM +0000, 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.
July 24
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


July 25
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
July 25
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.
July 25
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.
July 25
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?
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