reading file byLine

[Namal via Digitalmars-d-learn]

On Friday, 18 September 2015 at 10:34:41 UTC, Edwin van Leeuwen 
wrote:
> On Friday, 18 September 2015 at 10:26:46 UTC, Namal wrote:
>> Hello guys, is there a nice functional way to read the file 
>> which is like
>>
>>
>> 1,2,3,4,5,6
>> 2,3,4,5,6,7
>> 8,9,0,9,2,3
>>
>> line by line, split numbers and remove each ','
>> convert it to int and save in a matrix int[][] arr?
>
> Not tested, but I think the following should work:
>
> auto matrix = str
>   .byLine
>   .map!((l) => l.split(",")    // Split each line
>                 .map!(to!int)  // Turn into ints
>                 .array)        // Return an array
>   .array // Copy into an array

And how do tell here to read my file?