Pretty-printing D arrays with Mir

[tastyminerals]

On Sunday, 31 May 2020 at 23:10:44 UTC, jmh530 wrote:
> On Sunday, 31 May 2020 at 22:40:09 UTC, tastyminerals wrote:
>> I often print arrays to see how they look and their contents.
>> NumPy has a nice way of pretty-printing the arrays, and I was 
>> lacking this in D.
>> For the sake of practice, I wrote a small package. It uses 
>> mir.ndslice but works for both standard D arrays and Mir 
>> Slices.
>>
>> import pretty_array;
>> import mir.ndslice;
>> import std.stdio;
>>
>> void main() {
>>     auto b = [2, 2, 6].iota!int(1).fuse;
>>     b.prettyArr.writeln;
>> }
>> ┌                   ┐
>> │┌                 ┐│
>> ││ 1  2  3  4  5  6││
>> ││ 7  8  9 10 11 12││
>> │└                 ┘│
>> │┌                 ┐│
>> ││13 14 15 16 17 18││
>> ││19 20 21 22 23 24││
>> │└                 ┘│
>> └                   ┘
>>
>> https://github.com/tastyminerals/pretty_d_array
>>
>> There are of course a couple of things to finish like floating 
>> precision and small number suppression.
>> Still, hope somebody will find it handy.
>
> Interesting.
>
> I had done some work in 2018 for numir format facilities. At 
> the time mir didn’t have a way to do @nogc formatting, but it 
> does now. It might be interesting to either revisit that or 
> think about getting this into mir.

I see. It depends on how much work is needed for any of the 
options, right?

For now, I think having a function that does the job suffices for 
me at least. Since I always printed tensors in Python to see 
what's going on, I was lacking the same functionality in Mir.
I don't code in D on a daily basis but still try to learn by 
doing small stuff. I think the current implementation is far from 
being included into anything without rigorous code review but 
would be glad to see better slice formatting in Mir.