Examine Folder Contents?

[Joshua Muheim]

Hi all

I'd like Ruby to open a folder, search it for files and then store all
files names of .png files in an array and close the folder. So after
this I can do anything I like with the png files in the array...

How do I do this? Thanks a lot for help.
Joshua

 

[Benjohn Barnes]

Hi all

I'd like Ruby to open a folder, search it for files and then store all
files names of .png files in an array and close the folder. So after
this I can do anything I like with the png files in the array...

How do I do this? Thanks a lot for help.
Joshua

You'll want the class Dir, and the class method glob.
png_files = Dir.glob(File.join(path_of_folder, '*.png'))

Cheers,
Benj

 

[Joshua Muheim]

You'll want the class Dir, and the class method glob.

png_files = Dir.glob(File.join(path_of_folder, '*.png'))

Cheers,
Benj

Thank you so far. I'm using this in Ruby on Rails and tried the
following:

@images = Dir.glob('/images/content/parties/photo_galleries/1/',
'*.jpg')

Sadly this delivers me an empty array, but there are about 20 jpg files
in this folder... :-/

Thanks for help... Josh

 

[Stephen Waits]

@images = Dir.glob('/images/content/parties/photo_galleries/1/',
'*.jpg')

Try:

@images = Dir.glob('/images/content/parties/photo_galleries/1/
*.jpg')

--Steve

 

[Daniel Seuthe]

I'd like Ruby to open a folder, search it for files and then store all
files names of .png files in an array and close the folder. So after
this I can do anything I like with the png files in the array...

This is part of a RHTML file for showing all JPEG files as a list:

<% bilder = Dir["*.jpeg"] %>
<ul>
<% bilder.sort.each do |bild| %>
<li><a href="<%= bild %>" /><%= bild.chomp ".jpeg" %></a></li>
<% end %>
</ul>

This is part of a RHTML file for randomly show a picture from a
picture list like above:

<% bilder = Dir["../*.jpeg"] %>
<img src="<%=bilder[rand(bilder.length - 1)] %>" alt="" />

Daniel

 

[baumanj]

This is operating on the actual filesystem, so you have to use real
paths, not the URI for the web application. Try this:

File.join(RAILS_ROOT, 'public')

@images = Dir.glob(File.join(RAILS_ROOT,
'public/images/content/parties/photo_galleries/1/'), '*.jpg')

 

[Joshua Muheim]

Thank you all, guys!

I have now the following array:

-
/Users/Josh/Webwork/PsyGuide.org/public/../config/../public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-01.jpg
-
/Users/Josh/Webwork/PsyGuide.org/public/../config/../public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-02.jpg
-
/Users/Josh/Webwork/PsyGuide.org/public/../config/../public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-03.jpg
-
/Users/Josh/Webwork/PsyGuide.org/public/../config/../public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-04.jpg
-
/Users/Josh/Webwork/PsyGuide.org/public/../config/../public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-05.jpg
-
/Users/Josh/Webwork/PsyGuide.org/public/../config/../public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-06.jpg
-
/Users/Josh/Webwork/PsyGuide.org/public/../config/../public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-07.jpg
-
/Users/Josh/Webwork/PsyGuide.org/public/../config/../public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-08.jpg
-
/Users/Josh/Webwork/PsyGuide.org/public/../config/../public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-09.jpg
-
/Users/Josh/Webwork/PsyGuide.org/public/../config/../public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-10.jpg
-
/Users/Josh/Webwork/PsyGuide.org/public/../config/../public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-11.jpg
-
/Users/Josh/Webwork/PsyGuide.org/public/../config/../public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-12.jpg
-
/Users/Josh/Webwork/PsyGuide.org/public/../config/../public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-13.jpg
-
/Users/Josh/Webwork/PsyGuide.org/public/../config/../public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-14.jpg
-
/Users/Josh/Webwork/PsyGuide.org/public/../config/../public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-15.jpg
-
/Users/Josh/Webwork/PsyGuide.org/public/../config/../public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-16.jpg
-
/Users/Josh/Webwork/PsyGuide.org/public/../config/../public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-17.jpg
-
/Users/Josh/Webwork/PsyGuide.org/public/../config/../public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-18.jpg
-
/Users/Josh/Webwork/PsyGuide.org/public/../config/../public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-19.jpg
-
/Users/Josh/Webwork/PsyGuide.org/public/../config/../public/images/content/parties/photo_galleries/1/2005_10_08_-_claudias_abschieds_party-20.jpg

Is there a way to clean the path (I mean the unnecessary "/..")?

Thanks.

 

[ara.t.howard]

Is there a way to clean the path (I mean the unnecessary "/..")?

list_of_paths.map!{|path| File.expand_path path}

-a

 

[Joshua Muheim]

Oh, and how do I cut the RAILS_ROOT away again? So I can use the paths
in the RHTML file again...?

 

[ChrisH]

You might want to look at Pathname
(http://ruby-doc.org/stdlib/libdoc/pathname/rdoc/classes/Pathname.html)

It wraps alot of the File related libs into a nice package

Cheers