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digitalmars.D.learn - multidimensional indexing/slicing docs?

reply "John Colvin" <john.loughran.colvin gmail.com> writes:
Is there anywhere that describes what Kenji (it was Kenji wasn't 
it?) recently implemented for this?
Aug 06 2014
next sibling parent reply "Vlad Levenfeld" <vlevenfeld gmail.com> writes:
On Wednesday, 6 August 2014 at 08:48:25 UTC, John Colvin wrote:

 Is there anywhere that describes what Kenji (it was Kenji 
 wasn't it?) recently implemented for this?


I'm curious about this as well. I've just come across a case 
where I need to work with a 2D array of channels*samples from an 
analog-digital converter, and what I thought would be a 
straightforward design problem turned out to be pretty 
complicated. I have a C++ solution but its procedural/oop. Going 
functional and range-based would be a huge improvement, but I'm 
caught in "analysis paralysis."
Aug 06 2014
next sibling parent "H. S. Teoh via Digitalmars-d-learn" <digitalmars-d-learn puremagic.com> writes:
On Wed, Aug 06, 2014 at 06:10:43PM +0000, Vlad Levenfeld via
Digitalmars-d-learn wrote:

 On Wednesday, 6 August 2014 at 08:48:25 UTC, John Colvin wrote:

Is there anywhere that describes what Kenji (it was Kenji wasn't it?)
recently implemented for this?


 
 I'm curious about this as well. I've just come across a case where I
 need to work with a 2D array of channels*samples from an
 analog-digital converter, and what I thought would be a
 straightforward design problem turned out to be pretty complicated. I
 have a C++ solution but its procedural/oop. Going functional and
 range-based would be a huge improvement, but I'm caught in "analysis
 paralysis."


AFAIK, what Kenji implemented was just the support necessary for
implementing a multidimensional array type with overloaded opIndex /
opSlice / opDollar. I don't think there's any functional / range-based
things actually built on top of this at present.  I'm also quite
interested in this topic, and several people in the past have also
voiced similar interests. But I don't think we have anything standard
just yet.

In any case, what Kenji did was basically to implement support for:

	arr[i,j,k,...];		// opIndex
	arr[i,j,k,...] = ...;	// opIndexAssign
	arr[i1 .. i2, j1 .. j2, ...];	// opSlice
	arr[i..$, j..$, k..$];	// opSlice / opDollar

and perhaps one or two others.

And, looking at the docs on dlang.org, evidently this feature isn't
documented yet. :-(  Maybe if I get some free time later today I'll take
a shot at documenting it.


T

-- 
What do you call optometrist jokes? Vitreous humor.
Aug 06 2014
prev sibling next sibling parent "H. S. Teoh via Digitalmars-d-learn" <digitalmars-d-learn puremagic.com> writes:
On Wed, Aug 06, 2014 at 11:21:51AM -0700, H. S. Teoh via Digitalmars-d-learn
wrote:
[...]

 In any case, what Kenji did was basically to implement support for:
 
 	arr[i,j,k,...];		// opIndex
 	arr[i,j,k,...] = ...;	// opIndexAssign
 	arr[i1 .. i2, j1 .. j2, ...];	// opSlice
 	arr[i..$, j..$, k..$];	// opSlice / opDollar
 
 and perhaps one or two others.


OK, found the pull that implemented this, which also has a description
of what was implemented:

	https://github.com/D-Programming-Language/dmd/pull/443

I'll see if I can cook up a PR to incorporate this into the language
docs on dlang.org.


T

-- 
Heuristics are bug-ridden by definition. If they didn't have bugs, they'd be
algorithms.
Aug 06 2014
prev sibling parent "H. S. Teoh via Digitalmars-d-learn" <digitalmars-d-learn puremagic.com> writes:
On Wed, Aug 06, 2014 at 12:16:57PM -0700, H. S. Teoh via Digitalmars-d-learn
wrote:

 On Wed, Aug 06, 2014 at 11:21:51AM -0700, H. S. Teoh via Digitalmars-d-learn
wrote:
 [...]

 In any case, what Kenji did was basically to implement support for:
 
 	arr[i,j,k,...];		// opIndex
 	arr[i,j,k,...] = ...;	// opIndexAssign
 	arr[i1 .. i2, j1 .. j2, ...];	// opSlice
 	arr[i..$, j..$, k..$];	// opSlice / opDollar
 
 and perhaps one or two others.


 
 OK, found the pull that implemented this, which also has a description
 of what was implemented:
 
 	https://github.com/D-Programming-Language/dmd/pull/443
 
 I'll see if I can cook up a PR to incorporate this into the language
 docs on dlang.org.


[...]

https://github.com/D-Programming-Language/dlang.org/pull/625


T

-- 
What is Matter, what is Mind? Never Mind, it doesn't Matter.
Aug 07 2014
prev sibling next sibling parent "Stefan Frijters" <sfrijters gmail.com> writes:
On Wednesday, 6 August 2014 at 08:48:25 UTC, John Colvin wrote:

 Is there anywhere that describes what Kenji (it was Kenji 
 wasn't it?) recently implemented for this?


Not what you asked for, but maybe useful nonetheless: Denis 
Shelomovskij has written a multidimensional array implementation 
using the new syntax[1]. I've been using it in my code for a 
while now and it's been working great so far.

[1] 
http://denis-sh.bitbucket.org/unstandard/unstd.multidimarray.html
Aug 06 2014
prev sibling parent "H. S. Teoh via Digitalmars-d-learn" <digitalmars-d-learn puremagic.com> writes:
On Wed, Aug 06, 2014 at 08:48:24AM +0000, John Colvin via Digitalmars-d-learn
wrote:

 Is there anywhere that describes what Kenji (it was Kenji wasn't it?)
 recently implemented for this?


https://github.com/D-Programming-Language/dlang.org/pull/625


--T
Aug 06 2014