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digitalmars.D.learn - Flatten range of ranges

reply new to d <a a.com> writes:
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.
May 06 2010
parent reply =?UTF-8?B?QWxpIMOHZWhyZWxp?= <acehreli yahoo.com> writes:
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
May 06 2010
parent reply =?UTF-8?B?QWxpIMOHZWhyZWxp?= <acehreli yahoo.com> writes:
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
May 06 2010
parent reply Philippe Sigaud <philippe.sigaud gmail.com> writes:
On Thu, May 6, 2010 at 18:24, Ali =C7ehreli <acehreli yahoo.com> wrote:


 Ali =C7ehreli wrote:


 new to d wrote:


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

 auto a =3D [[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
May 06 2010
next sibling parent reply Graham Fawcett <fawcett uwindsor.ca> writes:
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
May 06 2010
parent Philippe Sigaud <philippe.sigaud gmail.com> writes:
 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
May 06 2010
prev sibling next sibling parent reply Graham Fawcett <fawcett uwindsor.ca> writes:
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
May 06 2010
parent reply Graham Fawcett <fawcett uwindsor.ca> writes:
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
May 06 2010
parent Philippe Sigaud <philippe.sigaud gmail.com> writes:
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
May 06 2010
prev sibling parent new to d <a a.com> writes:
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/
ocs/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/trait
2.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.
May 06 2010