mir.ndslice: assign a vector to a matrix row

[9il]

On Friday, 28 December 2018 at 08:09:09 UTC, 9il wrote:
> On Thursday, 27 December 2018 at 21:17:48 UTC, David wrote:
>> On Wednesday, 26 December 2018 at 18:59:25 UTC, 9il wrote:
>>> On Saturday, 15 December 2018 at 19:04:37 UTC, David wrote:
>>>> [...]
>>>
>>> matrix[2][] = vector;
>>>
>>> Or
>>>
>>> matrix[2,0..$] = vector;
>>
>> great many thanks!! Is there any logic why getting a row works 
>> by
>>
>> auto row = matrix[0];
>>
>> but assigning to a row works (only) by the two variant you 
>> posted?
>
> This case gets a slice of a row, it does not copy the data. So 
> row[i] is matrix[0, i], the same number in the RAM.
>
> auto row = matrix[0];
>
> This case gets a slice of a row, it does not copy the data.
>
> If you wish to copy data you need to use a slice on the right 
> side:
>

EDIT: a slice on the LEFT side