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digitalmars.D.learn - Remove filename from path

reply "Suliman" <evermind live.ru> writes:
What is the best way to remove file name from full path?

string path = thisExePath()
Sep 24 2014
parent reply "monarch_dodra" <monarchdodra gmail.com> writes:
On Wednesday, 24 September 2014 at 10:11:04 UTC, Suliman wrote:

 What is the best way to remove file name from full path?

 string path = thisExePath()


Seems like "dirName" in std.path is a good candidate ;)


You'll find many other path manipulation functions there.
Sep 24 2014
parent reply "Suliman" <evermind live.ru> writes:
 string path = thisExePath()


 Seems like "dirName" in std.path is a good candidate ;)


 You'll find many other path manipulation functions there.


Thanks! But if I want to strip it, how I can cut it?
Sep 24 2014
next sibling parent reply "Suliman" <evermind live.ru> writes:
I can't understand how to use strip? For example I would like to 
cut just extension.

path = path.stripRight("exe");
Error: no overload matches for stripRight(C)(C[] str) if
Sep 24 2014
next sibling parent ketmar via Digitalmars-d-learn <digitalmars-d-learn puremagic.com> writes:
On Wed, 24 Sep 2014 10:35:28 +0000
Suliman via Digitalmars-d-learn <digitalmars-d-learn puremagic.com>
wrote:


 I can't understand how to use strip? For example I would like to=20
 cut just extension.


std.path.setExtension is your friend.
Sep 24 2014
prev sibling next sibling parent "monarch_dodra" <monarchdodra gmail.com> writes:
On Wednesday, 24 September 2014 at 10:35:29 UTC, Suliman wrote:

 I can't understand how to use strip? For example I would like 
 to cut just extension.

 path = path.stripRight("exe");
 Error: no overload matches for stripRight(C)(C[] str) if


"stripExtension" would be your friend here.

If you want the extension, then "extension".

As a general rule, everything you need to manipulate paths and 
filenames is in std.path:
http://dlang.org/phobos/std_path.html
Sep 24 2014
prev sibling parent reply "monarch_dodra" <monarchdodra gmail.com> writes:
On Wednesday, 24 September 2014 at 10:35:29 UTC, Suliman wrote:

 I can't understand how to use strip? For example I would like 
 to cut just extension.

 path = path.stripRight("exe");
 Error: no overload matches for stripRight(C)(C[] str) if


strip doens't work that way. It simply removes leading/trailing 
white.

There's a version in std.algorithm which is more generic, but it 
accepts either a predicate, or an element, but not a range.

Unfortunately, there is no generic function that allows striping 
of a specific ending range (though there are ways to either 
detect it, or strip it from the end).
If you want something generic, then:

     string path = "myFile.doc";
     string extension = ".doc";
     if (path.endsWith(extension))
         path = path[0 .. $ - extension.length];

Would work.
Sep 24 2014
next sibling parent reply ketmar via Digitalmars-d-learn <digitalmars-d-learn puremagic.com> writes:
On Wed, 24 Sep 2014 12:21:40 +0000
monarch_dodra via Digitalmars-d-learn
<digitalmars-d-learn puremagic.com> wrote:


 Unfortunately, there is no generic function that allows striping=20
 of a specific ending range


but for strings we have std.string.chomp.
Sep 24 2014
parent reply "monarch_dodra" <monarchdodra gmail.com> writes:
On Wednesday, 24 September 2014 at 12:29:09 UTC, ketmar via 
Digitalmars-d-learn wrote:

 On Wed, 24 Sep 2014 12:21:40 +0000
 monarch_dodra via Digitalmars-d-learn
 <digitalmars-d-learn puremagic.com> wrote:


 Unfortunately, there is no generic function that allows 
 striping of a specific ending range


 but for strings we have std.string.chomp.


I missread that documentation. I thought it removed all 
characters that can also be found in delim. Power to me.
Sep 24 2014
parent ketmar via Digitalmars-d-learn <digitalmars-d-learn puremagic.com> writes:
On Wed, 24 Sep 2014 12:39:01 +0000
monarch_dodra via Digitalmars-d-learn
<digitalmars-d-learn puremagic.com> wrote:


 I missread that documentation. I thought it removed all=20
 characters that can also be found in delim. Power to me.


ah, i just found this function (really, less than hour ago), that's why
i still remember where it is and what it's doing. ;-)
Sep 24 2014
prev sibling parent reply =?UTF-8?B?QWxpIMOHZWhyZWxp?= <acehreli yahoo.com> writes:
On 09/24/2014 05:21 AM, monarch_dodra wrote:

 On Wednesday, 24 September 2014 at 10:35:29 UTC, Suliman wrote:

 I can't understand how to use strip? For example I would like to cut
 just extension.

 path = path.stripRight("exe");
 Error: no overload matches for stripRight(C)(C[] str) if


 strip doens't work that way. It simply removes leading/trailing white.

 There's a version in std.algorithm which is more generic, but it accepts
 either a predicate, or an element, but not a range.

 Unfortunately, there is no generic function that allows striping of a
 specific ending range (though there are ways to either detect it, or
 strip it from the end).
 If you want something generic, then:

      string path = "myFile.doc";
      string extension = ".doc";
      if (path.endsWith(extension))
          path = path[0 .. $ - extension.length];

 Would work.


find() and friends can be used:

import std.algorithm;

void main()
{
     string path = "myFile.doc";
     string extension = ".doc";

     path = findSplitBefore(path, extension)[0];
     assert(path == "myFile");
}

And three retro()s make one modern(): :p

import std.algorithm;
import std.range;

void main()
{
     string path = "myFile.doc";
     string extension = ".doc";

     path = findSplitAfter(path.retro,
                           extension.retro)
            [1].retro;

     assert(path == "myFile");
}

Ali
Sep 24 2014
parent "monarch_dodra" <monarchdodra gmail.com> writes:
On Wednesday, 24 September 2014 at 17:15:39 UTC, Ali Çehreli 
wrote:

 find() and friends can be used:

 import std.algorithm;

 void main()
 {
     string path = "myFile.doc";
     string extension = ".doc";

     path = findSplitBefore(path, extension)[0];
     assert(path == "myFile");
 }


I had thought of that, but then you might get in trouble with 
something like:
string path = "myPath.doc.old"


 And three retro()s make one modern(): :p

 import std.algorithm;
 import std.range;

 void main()
 {
     string path = "myFile.doc";
     string extension = ".doc";

     path = findSplitAfter(path.retro,
                           extension.retro)
            [1].retro;

     assert(path == "myFile");
 }

 Ali


That was the next one I had. Except here:
- You still run into issues if the extension is *not* .doc (and 
there happens to be a .doc somewhere in there).
- You are paying for a search, when you are only interested in 
testing a prefix.

I had thought of this though:
void main()
{
     string path = "myFile.doc";
     string extension = ".doc";

     auto rpath = path.retro();
     skipOver(rpath, extension.retro);
     path = rpath.retro();
     assert(path == "myFile");
}

The "issue" though is that skipOver modifies an rvalue, so it's 
not as "functional-style" as I would have liked it.

Anyways, the conclusion here (IMO), is that to manipulate paths, 
use std.path.
Sep 25 2014
prev sibling parent reply "Jay Norwood" <jayn prismnet.com> writes:
On Wednesday, 24 September 2014 at 10:28:05 UTC, Suliman wrote:

 string path = thisExePath()


 Seems like "dirName" in std.path is a good candidate ;)


 You'll find many other path manipulation functions there.


 Thanks! But if I want to strip it, how I can cut it?


dirName gives the directory,  baseName the filename, 
stripExtension strips it, so seems like what you want is
dirName  ~ stripExtension( baseName )
Sep 25 2014
parent "Jay Norwood" <jayn prismnet.com> writes:
On Friday, 26 September 2014 at 03:32:46 UTC, Jay Norwood wrote:

 On Wednesday, 24 September 2014 at 10:28:05 UTC, Suliman wrote:

 string path = thisExePath()


 Seems like "dirName" in std.path is a good candidate ;)


 You'll find many other path manipulation functions there.


 Thanks! But if I want to strip it, how I can cut it?


 dirName gives the directory,  baseName the filename, 
 stripExtension strips it, so seems like what you want is
 dirName  ~ stripExtension( baseName )


easier than that.  Looks like stripExtension handles the whole 
path.

assert (stripExtension("dir/file.ext")   == "dir/file");
Sep 25 2014