ndslice: allow: a[ _, 9, R(2, $, -3)] as matlab's a[: ,9, reverse(2:3:end)) ]

[Timothee Cour via Digitalmars-d]

After more thought (since you have freedom of redesigning from scratch),
how about this:

https://docs.google.com/document/d/1cEf8AynZEZxlTENJx1i4w1GTB481bbc4iUbUeJT00-U/edit#heading=h.uxrd8sd74w8r



On Fri, Jan 8, 2016 at 11:00 PM, Ilya Yaroshenko via Digitalmars-d <
digitalmars-d at puremagic.com> wrote:

> On Saturday, 9 January 2016 at 06:20:46 UTC, Ilya wrote:
>
>> On Saturday, 9 January 2016 at 00:26:42 UTC, Timothee Cour wrote:
>>
>>> i wrote my own tensor library a while ago and it allows the more
>>> convenient matlab/python+numpy like syntax:
>>>
>>> a[ _, 9, R(2, $, -3)]
>>> these are allowed:
>>> R() or _: full range for an index
>>> R(a,b): a..b
>>> R(a,b,s): when s>0, iota(a,b,s)
>>> R(a,b,s): when s<0, iota(a,b,-s).reverse
>>>
>>> Could we have this in ndslice?
>>>
>>
>>
>> Is `a[ _, 9, R(2, $, -3)]`
>>
>> equals to
>>
>> `a[0..$, 9, 2..$].reversed!2.strided!2(3)`
>> or
>> `a[0..$, 9, 2..$].strided!2(3).reversed!2`
>> ?
>>
>
> My bad. You have already wrote `iota(a,b,-s).reverse`.
>
> We can test this kind of syntax in Mir first
> https://github.com/DlangScience/mir
> --Ilya
>
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