reading file byLine

[Namal via Digitalmars-d-learn]

On Friday, 18 September 2015 at 11:06:46 UTC, Edwin van Leeuwen 
wrote:
> On Friday, 18 September 2015 at 10:48:25 UTC, Namal wrote:
>> 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?
>
> Replace str with File("myfile"):
>
> auto matrix = File("myfile")
>    .byLine
>    .map!((l) => l.split(",")    // Split each line
>                  .map!(to!int)  // Turn into ints
>                  .array)        // Return an array
>    .array // Copy into an array



import std.file, std.stdio, std.string, std.conv, std.algorithm, 
std.array;

	void main(){

	auto matrix = File("test.txt")
    .byLine
    .map!((l) => l.split(",")    // Split each line
                  .map!(to!int)  // Turn into ints
                  .array)        // Return an array
    .array();
	
	matrix.writeln;
}

compiles but crashes