Menu
Search

Forums

Forum Index

Thread overview
save() feature for iota
Nov 03, 2022
Salih Dincer
Nov 03, 2022
Paul Backus
Nov 03, 2022
Ali Çehreli
Nov 04, 2022
Salih Dincer
Nov 04, 2022
Imperatorn
November 03, 2022
Gravatar of Salih DincerPosted by Salih DincerReply
Salih Dincer
Gravatar of Salih Dincer


Reply

Hi All,

Isn't there a save feature for iota()?

import std.stdio;
import std.range;

void main()
{
  foreach(num; iota!char('a', 'f').chunks(3)/*
              "onetwosixfour".chunks(3)//*/
  ) {
		//auto n = num.save();
		num.writeln(": ", num.walkLength);
  }
} /* Prints:
: 3
: 2
*/

So is there a way to find out the length of an iota() range without consuming it?

SDB@79

November 03, 2022
Gravatar of Paul BackusPosted by Paul Backus
in reply to Salih Dincer		Reply
Paul Backus
Gravatar of Paul Backus
Posted in reply to Salih Dincer


Reply

On Thursday, 3 November 2022 at 06:26:22 UTC, Salih Dincer wrote:

>

Hi All,

Isn't there a save feature for iota()?

Looking at the source, it seems that only the numeric overloads of iota implement save. I think this is probably just an oversight, though, since I can't see any reason why save wouldn't work just as well for the generic version.

I've submitted an enhancement request for this to the D bug tracker: https://issues.dlang.org/show_bug.cgi?id=23453

November 03, 2022
Gravatar of Ali ÇehreliPosted by Ali Çehreli
in reply to Paul Backus		Reply
Ali Çehreli
Gravatar of Ali Çehreli
Posted in reply to Paul Backus


Reply
On 11/3/22 04:58, Paul Backus wrote:

> https://issues.dlang.org/show_bug.cgi?id=23453

Even though iterating over UTF value ranges don't make sense in general, they would work for some values including the ASCII range.

Ali
November 04, 2022
Gravatar of Salih DincerPosted by Salih Dincer
in reply to Paul Backus		Reply
Salih Dincer
Gravatar of Salih Dincer
Posted in reply to Paul Backus


Reply
On Thursday, 3 November 2022 at 11:58:20 UTC, Paul Backus wrote:
> On Thursday, 3 November 2022 at 06:26:22 UTC, Salih Dincer Looking at the source, it seems that only the numeric overloads of `iota` implement `save`. I think this is probably just an oversight, though, since I can't see any reason why `save` wouldn't work just as well for the generic version.

The problem I'm having here seems to be chunk related. But using a template like iota!char for some reason does not affect the output result. I showed these situations in the example in the Turkish forum:

https://forum.dlang.org/thread/jbklbbozmisahohouzsn@forum.dlang.org

SDB@79
November 04, 2022
Gravatar of ImperatornPosted by Imperatorn
in reply to Salih Dincer		Reply
Imperatorn
Gravatar of Imperatorn
Posted in reply to Salih Dincer


Reply
On Friday, 4 November 2022 at 08:48:36 UTC, Salih Dincer wrote:
> On Thursday, 3 November 2022 at 11:58:20 UTC, Paul Backus wrote:
>> On Thursday, 3 November 2022 at 06:26:22 UTC, Salih Dincer Looking at the source, it seems that only the numeric overloads of `iota` implement `save`. I think this is probably just an oversight, though, since I can't see any reason why `save` wouldn't work just as well for the generic version.
>
> The problem I'm having here seems to be chunk related. But using a template like iota!char for some reason does not affect the output result. I showed these situations in the example in the Turkish forum:
>
> https://forum.dlang.org/thread/jbklbbozmisahohouzsn@forum.dlang.org
>
> SDB@79

See Pauls response