Guide - Migrating from std.experimental.ndslice to mir-algorithm

[Zz via Digitalmars-d-learn]

On Saturday, 3 June 2017 at 05:21:13 UTC, 9il wrote:
> On Friday, 2 June 2017 at 16:08:20 UTC, Zz wrote:
>> Hi,
>>
>> Just tried migrating from std.experimental.ndslice to 
>> mir-algorithm.
>>
>> Is there a guide on how migrate old code?
>>
>> I used the following imports before and using then with 
>> ndslice.
>>
>> import std.experimental.ndslice;
>> import std.algorithm : each, max, sort;
>> import std.range : iota, repeat;
>>
>> simplified example of how it was used.
>> auto a = cr.iota.sliced(r, c);
>> auto b = a.reshape(c, r).transposed!1;
>>
>> auto c = a.reversed!1;
>> auto d = a.reshape(c, r).transposed!1.reversed!1;
>>
>> auto f = new int[cr].sliced(r, c);
>> auto h = f.transposed(1);
>>
>> how can I do the following in mir-algorithm.
>>
>> Note: I will be going through the documentation.
>>
>> Zz
>
> Hello Zz,
>
> std.experimental.ndslice -> mir.ndslice
>
> std.range : iota, repeat -> mir.ndslice.topology: iota, repeat;
> std.algorithm : each; -> mir.ndslice.algorithm: each;
> std.algorithm : max; -> mir.utility: max;
> std.algorithm : sort; -> mir.ndslice.sorting: sort;
>
>
> Note, that Mir functions has different semantics compared with 
> Phobos!
> For example, each iterates deep elements, so should be combined 
> with `pack` to iterates rows instead of elements.
>
> Ndslices work with Phobos functions but it is suggested to use 
> Mir analogs if any.
>
> // Mir's iota! It is already 2D ndslice :-)
> auto a = [r, c].iota;
>
> auto b = a
>    // returns flattened iota, a has Contiguous kind,
>    // so the result type would be equal to `iota(r*c)`
>     .flattened
>     // convert 1D iota ndslice to 2D iota ndslice
>     .sliced(c, r)
>     // It is required to use transposed
>     // Convert ndslice kind from Contiguous to Universal.
>     .universal
>     // Transpose the Universal ndslice
>     .transposed;
>
> auto c = a.universal.reversed!1;
> auto d = a.flattened.sliced(c, 
> r).universal.transposed!1.reversed!1; // see also `rotated`
>
> auto f = slice!int(c, r); // new int[cr].sliced(r, c); works 
> too.
> auto h = f.universal.transposed(1);
>
> -------
> Mir ndslices have three kinds: 
> http://docs.algorithm.dlang.io/latest/mir_ndslice_slice.html#.SliceKind
>
> If you have any questions feel free to ask at the Gitter:
> https://gitter.im/libmir/public
>
> Best,
> Ilya
>
> Best,
> Ilya

Thanks