Is there any function in phobos that does something like that:

auto a = [[1,2],[3,4]];
assert(equals(flatten(a), [1,2,3,4]));

I am just learning D and ca't find anything like that in the docs.

new to d wrote:
> Is there any function in phobos that does something like that:
> 
> auto a = [[1,2],[3,4]];
> assert(equals(flatten(a), [1,2,3,4]));
> 
> I am just learning D and ca't find anything like that in the docs.

How about chain:

  http://digitalmars.com/d/2.0/phobos/std_range.html#chain

Ali

Ali Çehreli wrote:
> new to d wrote:
>> Is there any function in phobos that does something like that:
>>
>> auto a = [[1,2],[3,4]];
>> assert(equals(flatten(a), [1,2,3,4]));
>>
>> I am just learning D and ca't find anything like that in the docs.
> 
> How about chain:
> 
>   http://digitalmars.com/d/2.0/phobos/std_range.html#chain

Sorry, of course that's not what you wanted... :(

Ali

On Thu, May 6, 2010 at 18:24, Ali Çehreli <acehreli@yahoo.com> wrote:

> Ali Çehreli wrote:
>
>> new to d wrote:
>>
>>> Is there any function in phobos that does something like that:
>>>
>>> auto a = [[1,2],[3,4]];
>>> assert(equals(flatten(a), [1,2,3,4]));
>>>
>>> I am just learning D and ca't find anything like that in the docs.
>>>
>>
I've this in a dsource project:

http://svn.dsource.org/projects/dranges/trunk/docs/range2.html
(look for flatten or concat). It's a lazy range. Flatten depends on a
template for wrapping code, present in the traits2 module.

http://www.dsource.org/projects/dranges/browser/trunk/range2.d http://www.dsource.org/projects/dranges/browser/trunk/traits2.d

Hmm, this is waiting for quite an update. I've lots of thing for
producing/mapping/filtering... ranges of ranges while conserving their
topology/rank.
If you find anything useful for you in this project, tell me!


Philippe

On Thu, 06 May 2010 19:01:04 +0200, Philippe Sigaud wrote:

> On Thu, May 6, 2010 at 18:24, Ali Çehreli <acehreli@yahoo.com> wrote:
> 
>> Ali Çehreli wrote:
>>
>>> new to d wrote:
>>>
>>>> Is there any function in phobos that does something like that:
>>>>
>>>> auto a = [[1,2],[3,4]];
>>>> assert(equals(flatten(a), [1,2,3,4]));
>>>>
>>>> I am just learning D and ca't find anything like that in the docs.
>>>>
>>>>
> I've this in a dsource project:
> 
> http://svn.dsource.org/projects/dranges/trunk/docs/range2.html (look for flatten or concat). It's a lazy range. Flatten depends on a template for wrapping code, present in the traits2 module.
> 
> http://www.dsource.org/projects/dranges/browser/trunk/range2.d http://www.dsource.org/projects/dranges/browser/trunk/traits2.d
> 
> Hmm, this is waiting for quite an update. I've lots of thing for
> producing/mapping/filtering... ranges of ranges while conserving their
> topology/rank.
> If you find anything useful for you in this project, tell me!

These are great! Thank you. Coming from some of the languages that you cite as inspirations, I found the limited set of range HOFs in D2 to be really unfortunate. Your project fills the gap!

Best,
Graham

On Thu, 06 May 2010 19:01:04 +0200, Philippe Sigaud wrote:

> On Thu, May 6, 2010 at 18:24, Ali Çehreli <acehreli@yahoo.com> wrote:
> 
>> Ali Çehreli wrote:
>>
>>> new to d wrote:
>>>
>>>> Is there any function in phobos that does something like that:
>>>>
>>>> auto a = [[1,2],[3,4]];
>>>> assert(equals(flatten(a), [1,2,3,4]));
>>>>
>>>> I am just learning D and ca't find anything like that in the docs.
>>>>
>>>>
> I've this in a dsource project:
> 
> http://svn.dsource.org/projects/dranges/trunk/docs/range2.html (look for flatten or concat). It's a lazy range. Flatten depends on a template for wrapping code, present in the traits2 module.
> 
> http://www.dsource.org/projects/dranges/browser/trunk/range2.d http://www.dsource.org/projects/dranges/browser/trunk/traits2.d

Newbie setup question: I'm interested in trying out dranges. What's the best way for me to "install" dranges, so that my test code can reference range2 and the other drange modules?

Thanks,
Graham

> These are great! Thank you. Coming from some of the languages that you cite as inspirations, I found the limited set of range HOFs in D2 to be really unfortunate. Your project fills the gap!
>
>
Fills, I'm not sure, but at least it's useful for me to digest both
clojure/Haskell (got rid of Scala) and D :-)
If you find any pb, don't hesitate to send me some mail, because I really
discover these functions as I go forward...


Philippe

On Thu, 06 May 2010 17:25:44 +0000, Graham Fawcett wrote:

> On Thu, 06 May 2010 19:01:04 +0200, Philippe Sigaud wrote:
> 
>> On Thu, May 6, 2010 at 18:24, Ali Çehreli <acehreli@yahoo.com> wrote:
>> 
>>> Ali Çehreli wrote:
>>>
>>>> new to d wrote:
>>>>
>>>>> Is there any function in phobos that does something like that:
>>>>>
>>>>> auto a = [[1,2],[3,4]];
>>>>> assert(equals(flatten(a), [1,2,3,4]));
>>>>>
>>>>> I am just learning D and ca't find anything like that in the docs.
>>>>>
>>>>>
>> I've this in a dsource project:
>> 
>> http://svn.dsource.org/projects/dranges/trunk/docs/range2.html (look for flatten or concat). It's a lazy range. Flatten depends on a template for wrapping code, present in the traits2 module.
>> 
>> http://www.dsource.org/projects/dranges/browser/trunk/range2.d http://www.dsource.org/projects/dranges/browser/trunk/traits2.d
> 
> Newbie setup question: I'm interested in trying out dranges. What's the best way for me to "install" dranges, so that my test code can reference range2 and the other drange modules?

I should clarify that I know I can just put the dranges sources in, e.g, a 'dranges' subdirectory, compile drange/*.d into a library and do something like:

dmd -Ldranges/dranges.a -Idranges test.d

...and I could modify /etc/dmd.conf by hand to add my dranges directory to the appropriate paths. But I wonder if I'm missing a more idiomatic way to install third-party libraries for D2.

Thanks,
Graham

Philippe Sigaud Wrote:

> On Thu, May 6, 2010 at 18:24, Ali Çehreli <acehreli@yahoo.com> wrote:
> 
> > Ali Çehreli wrote:
> >
> >> new to d wrote:
> >>
> >>> Is there any function in phobos that does something like that:
> >>>
> >>> auto a = [[1,2],[3,4]];
> >>> assert(equals(flatten(a), [1,2,3,4]));
> >>>
> >>> I am just learning D and ca't find anything like that in the docs.
> >>>
> >>
> I've this in a dsource project:
> 
> http://svn.dsource.org/projects/dranges/trunk/docs/range2.html
> (look for flatten or concat). It's a lazy range. Flatten depends on a
> template for wrapping code, present in the traits2 module.
> 
> http://www.dsource.org/projects/dranges/browser/trunk/range2.d http://www.dsource.org/projects/dranges/browser/trunk/traits2.d
> 
> Hmm, this is waiting for quite an update. I've lots of thing for
> producing/mapping/filtering... ranges of ranges while conserving their
> topology/rank.
> If you find anything useful for you in this project, tell me!
> 
> 
> Philippe
> 
> <br><br><div class="gmail_quote">On Thu, May 6, 2010 at 18:24, Ali Çehreli <span dir="ltr">&lt;<a href="mailto:acehreli@yahoo.com">acehreli@yahoo.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
> <div><div></div><div class="h5">Ali Çehreli wrote:<br>
> <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
> new to d wrote:<br>
> <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
> Is there any function in phobos that does something like that:<br>
> <br>
> auto a = [[1,2],[3,4]];<br>
> assert(equals(flatten(a), [1,2,3,4]));<br>
> <br>
> I am just learning D and ca't find anything like that in the docs.<br></blockquote></blockquote></div></div></blockquote><div><br>I've this in a dsource project:<br><br><a href="http://svn.dsource.org/projects/dranges/trunk/docs/range2.html">http://svn.dsource.org/projects/dranges/trunk/docs/range2.html</a> <br>
> </div></div>(look for flatten or concat). It's a lazy range. Flatten depends on a template for wrapping code, present in the traits2 module.<br><br><a href="http://www.dsource.org/projects/dranges/browser/trunk/range2.d">http://www.dsource.org/projects/dranges/browser/trunk/range2.d</a><br>
> <a href="http://www.dsource.org/projects/dranges/browser/trunk/traits2.d">http://www.dsource.org/projects/dranges/browser/trunk/traits2.d</a><br><br>Hmm, this is waiting for quite an update. I've lots of thing for producing/mapping/filtering... ranges of ranges while conserving their topology/rank.<br>
> If you find anything useful for you in this project, tell me!<br><br><br>Philippe<br><br>
> 

concat() in range2 seems to do exactly what i wanted, thank you.  I think something like that should be included in the standard library since it's a pretty basic operation. I haven't taken a good look at the other stuff in range2 yet.

Graham:
>I should clarify that I know I can just put the dranges sources in, e.g,

> a 'dranges' subdirectory, compile drange/*.d into a library and do something like:
>
> dmd -Ldranges/dranges.a -Idranges test.d
>
> ...and I could modify /etc/dmd.conf by hand to add my dranges directory to the appropriate paths. But I wonder if I'm missing a more idiomatic way to install third-party libraries for D2.
>
> Thanks,
> Graham
>
>
Then you know as much as me. I don't even compile them into a library, I just add them into my current project (Code::Blocks accepts this) and compile the entire project.

I just put a zip file in the download area with some new modules and all the
modules inside a dranges directory.
What I'd do is just putting the dranges dir inside my project and do

import dranges.all;

in my own module. It seems in this case you don't even need to indicate any
path or whatever.
"
module mymod;
import dranges.all;

void main() {}
"

% dmd mymod

(untested, I use DMD under windows and am on Linux right now, but IIRC it
worked for me.)

Philippe