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.
