Directory listing without . and

ruby-talk
1

Hi,
How can I get an array of all legitimate sub directories in the current
directory?

path = "D:/Traffic"
Dir.chdir(path)

This gives 2 extra entries "." and ".."
Dir.open(stationDir).entries.reject{|f| File.file?(f)}

Please help

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2

dekiru wrote:

unsubscribe

??

···

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3

Hi,
How can I get an array of all legitimate sub directories in the current
directory?

path = "D:/Traffic"
Dir.chdir(path)

This gives 2 extra entries "." and ".."
Dir.open(stationDir).entries.reject{|f| File.file?(f)}

In all my years of ruby I don't think I've ever used Dir.open(...).entries. I almost _always_ use Dir.glob (aka Dir[...]). I also almost always use the block form for chdir.

Dir.chdir("/Users/ryan") do
  p Dir[File.join("Work", "*")]
end

Outputs:

["Work/Icon\r", "Work/cvs", "Work/git", "Work/mirrors", "Work/misc", "Work/p4", "Work/svn"]

glob "*" outputs all "visible" files (non-dot files) but it can do a whole lot more too. ri Dir.glob for more details.

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On Aug 22, 2010, at 23:40 , Rajarshi Chakravarty wrote:

4

And the chdir isn't even needed here as far as I can see. This should
do the job:

dirs = Dir[File.join(path, '*')].select {|x| File.directory? x}

Kind regards

robert

···

2010/8/23 Ryan Davis <ryand-ruby@zenspider.com>:

On Aug 22, 2010, at 23:40 , Rajarshi Chakravarty wrote:

Hi,
How can I get an array of all legitimate sub directories in the current
directory?

path = "D:/Traffic"
Dir.chdir(path)

This gives 2 extra entries "." and ".."
Dir.open(stationDir).entries.reject{|f| File.file?(f)}

In all my years of ruby I don't think I've ever used Dir.open(...).entries. I almost _always_ use Dir.glob (aka Dir[...]). I also almost always use the block form for chdir.

Dir.chdir("/Users/ryan") do
p Dir[File.join("Work", "*")]
end

--
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

5

Yeah, I'm pretty sure that unsubscribing isn't going to fix the problem
of filtering out "." and ".." results from a directory listing.

···

On Mon, Aug 23, 2010 at 04:00:25PM +0900, Rajarshi Chakravarty wrote:

dekiru wrote:
> unsubscribe

??

--
Chad Perrin [ original content licensed OWL: http://owl.apotheon.org ]

6

Omitting all hidden entries may not be what OP wants. This skips not
only '.' and '..', but also (eg) '.git'. I find this way more robust:

Dir.entries(whatever)-['.','..']

···

On 8/23/10, Ryan Davis <ryand-ruby@zenspider.com> wrote:

On Aug 22, 2010, at 23:40 , Rajarshi Chakravarty wrote:

Hi,
How can I get an array of all legitimate sub directories in the current
directory?

path = "D:/Traffic"
Dir.chdir(path)

This gives 2 extra entries "." and ".."
Dir.open(stationDir).entries.reject{|f| File.file?(f)}

In all my years of ruby I don't think I've ever used Dir.open(...).entries.
I almost _always_ use Dir.glob (aka Dir[...]). I also almost always use the
block form for chdir.

Dir.chdir("/Users/ryan") do
  p Dir[File.join("Work", "*")]
end

Outputs:

["Work/Icon\r", "Work/cvs", "Work/git", "Work/mirrors", "Work/misc",
"Work/p4", "Work/svn"]

glob "*" outputs all "visible" files (non-dot files) but it can do a whole
lot more too. ri Dir.glob for more details.

7

Thank you, Ryan and Robert

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8

Yes. I said that.

···

On Aug 23, 2010, at 09:57 , Caleb Clausen wrote:

glob "*" outputs all "visible" files (non-dot files) but it can do a whole
lot more too. ri Dir.glob for more details.

Omitting all hidden entries may not be what OP wants. This skips not
only '.' and '..', but also (eg) '.git'.

9

Robert Klemme wrote:

dirs = Dir[File.join(path, '*')].select {|x| File.directory? x}

Use the directory matching power of file globbing patterns:

  dirs = Dir["#{path}/*/"]

Here, the '/' suffix makes the pattern match directories only!

Also, note that File.join() always uses '/', even on Windows:

  Path Separator and Windows - Ruby - Ruby-Forum

Cheers.

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10

Suraj Kurapati wrote:

Robert Klemme wrote:

dirs = Dir[File.join(path, '*')].select {|x| File.directory? x}

Use the directory matching power of file globbing patterns:

  dirs = Dir["#{path}/*/"]

Here, the '/' suffix makes the pattern match directories only!

If you also want to match dot-directories, use more glob power:

  dirs = Dir["#{path}/{*,.[^.]*}/"]

This will match both normal directories (*/) and dot directories
(.[^.]*/). But it will fail if you have a directory named '..foo' or
'........bar', for example.

Cheers.

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