mir.ndslice: assign a vector to a matrix row

[David]

On Friday, 28 December 2018 at 08:11:37 UTC, 9il wrote:
> 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:
>>>> [...]
>>>
>>> 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

Many thanks for this background!!