On Tuesday, 8 October 2013 at 14:41:47 UTC, Denis Shelomovskij
wrote:
I accidentally discovered Andrei wrote [1] multidimensional
array implementation is needed. If it really is, I will work to
revise the API and prepare my implementation [2] for review if
nobody is doing it already.
Also as Kenji's "multidimensional indexing and slicing" pull
[3] still not merged the only way is to use hacks like this:
---
// first two rows and three columns of the second matrix
array2d = matrices[1, R[0 .. 2], R[0 .. 3]];
---
[1] http://forum.dlang.org/post/kivkp0$csp$1...@digitalmars.com
[2]
http://denis-sh.bitbucket.org/unstandard/unstd.multidimensionalarray.html
[3] https://github.com/D-Programming-Language/dmd/pull/443
--- Previous related topics ---
At least the ones I participated in:
* October 09, 2011: Kenji Hara proposes "Matrix-type-friendly
syntax and more". His dmd pull #443 still isn't merged.
http://forum.dlang.org/thread/j6sp68$2a7k$1...@digitalmars.com
https://github.com/D-Programming-Language/dmd/pull/443
* October 25, 2011: Original "Multidimensional arrays for D"
post. No response from Phobos developers.
http://forum.dlang.org/thread/j864es$2gi0$1...@digitalmars.com
* June 17, 2012: A request for "template that can simulate a
rectangular array".
http://forum.dlang.org/thread
* June 30, 2012: A request for "fixed size multidimensional
array at runtime".
http://forum.dlang.org/thread/ldjzfqvnjltbbiovq...@forum.dlang.org
I don't normally post here a lot (though I'm a regular reader),
but I wanted to say I for one would really appreciate an official
solution for proper rectangular arrays. A bit of background: I'm
a numerical physicist focusing on the lattice Boltzmann
method[1], where most physical quantities live on a (3D) lattice.
Currently I'm using a Fortran code with is very feature-rich, but
has grown organically over a decade or so and the features have
come at the cost of maintainability and performance. As I'm very
much interested in the D language (though I cannot devote much
time to it at the moment) I've had plans of writing my own
smaller D code which would contain the features I need. It would
be nice to be able to use Phobos for my 3D array needs. Slicing
will also be much valued to make it easier to communicate
sections of the lattice through MPI. I would aim to undertake
this project after I've finished my PhD thesis, in ~2 months. I
don't assume an official Phobos version would be available at
that time, but even having a good idea of the API that is being
aimed for would save me a lot of time I think.
Cheers,
Stefan
[1] http://en.wikipedia.org/wiki/Lattice_Boltzmann_methods
