Range for files by character

[Stephan Schiffels]

On Monday, 20 May 2013 at 21:40:51 UTC, w0rp wrote:
> On Monday, 20 May 2013 at 21:36:41 UTC, Stephan Schiffels wrote:
>> Hi,
>>
>> I need an Input Range that iterates a file character by 
>> character. In bioinformatics this is often important, and 
>> having a D-range is of course preferable than any 
>> foreach-byLine combination, since we can apply filters and 
>> other goodies from std.algorithm. In this implementation, I am 
>> simply filtering out new-lines, as an example.
>>
>> import std.stdio;
>> import std.conv;
>> import std.algorithm;
>>
>> void main() {
>>  auto f = File("someFile.txt", "r");
>>  foreach(c; f.byChunk(1).filter!(a => to!char(a[0]) != '\n'))
>>    write(to!char(c[0]));
>> }
>>
>> Is this the right way to do it? I was a bit surprised that 
>> std.stdio doesn't provide a "byChar" or "byByte" range. Is 
>> there a reason for this, or is this a too special need?
>>
>> Stephan
>
> I would try f.byChunk(n).joiner. joiner is from std.algorithm 
> and it produces a range which joins a range of ranges, quite 
> like your typical array to string join function.

Ah, wonderful. That's exactly what I needed. I think that pretty 
much does what Jonathan suggested under the hood. I can also use 
byLine then, indeed...
Thanks.