Re: RePost: Help to convert a code to D

[Andre Artus]

On Monday, 26 August 2013 at 23:32:26 UTC, Andre Artus wrote:
On Monday, 26 August 2013 at 13:30:38 UTC, Alexandre wrote:
Hi :)
I'm starting with D language... and, I try to convert a C# code
to D...
So, my C# code, I get file informations, and, I create folders
with all days of month of specific year...

So, that is my C# code...

-- SNIP --

So, to create directory and move files... I get the 
documentation
on that page: http://dlang.org/phobos/std_file.html

But, I don't know, How I can get the file information and what 
is
the best way to create the directory's, so, I need some help :)

I appreciate the help :)

Okay, I banged together something that may be close to what you 
want. I'm not a D expert, so someone is sure to point out some 
areas for improvement.

There does not seem to be any reason to use objects/classes for 
what you want. In fact if I was to write it in C# I would make 
the methods static.

As an aside: it's not generally considered good practice to do 
expensive computations or IO in a constructor (BOCTAOE).

I did not split building the archive directory structure from 
the file moving part. I prefer to only create a directory if 
there is going to be a file in it. This may have a impact on 
performance, but I suspect it is negligible. If it's an issue 
measure, measure, measure.


module main;

import std.stdio, std.algorithm, std.conv;
import std.array, std.random, std.datetime;
import std.file, std.path, std.utf, std.string;


int main(string[] argv)
{
  // string prefixed with 'r' similar to '@' in C#
  auto searchPath = r"G:\archivetest\search";
  auto archivePath = r"G:\archivetest\archive";

  moveToArchive(searchPath, archivePath);

  return 0;
}

void moveToArchive(string searchPath, string archivePath)
{
  // This ought to be a library thing.
  immutable string[12] MesesDoAno =
  [
    "Janeiro", "Fevereiro",
    "Marco", "Abril",
    "Maio", "Junho",
    "Julho", "Agosto",
    "Setembro", "Outubro",
    "Novembro", "Dezembro"
  ];

  // http://dlang.org/phobos/std_file.html#.dirEntries
  auto de = dirEntries(searchPath,"*.RE{M,T}", 
SpanMode.shallow, false);

  // Sorting not required, just a personal preference
  auto sortedFiles =
    de.array.sort!((DirEntry x, DirEntry y)
      => x.timeLastModified < y.timeLastModified);

  foreach(DirEntry e; sortedFiles) {
    // I'm being extra verbose here so that it's easy to follow 
in a debugger

    auto tlm = e.timeLastModified;

When testing I used timeLastModified as that created the greatest 
variability with the files I had at my disposal. If you need to 
use the file creation time then replace with timeCreated, as 
follows:

auto sortedFiles = de.array.sort!((x, y) => x.timeCreated < 
y.timeCreated);
foreach(DirEntry e; sortedFiles) {
  auto tlm = e.timeCreated;