Rails - Sep 2008 - (Dir.glob("#{@path}/**/*/**") | Dir.glob("#{@path}/**")) != Dir.glob("#{@path}/**") ?

I tried to ask this question once in Ruby-talk and inside another post in
this list. No one answered me and I doubt anyone is able to answer it.

So, I tried changing the subject in a weird, although correct question, to
see if someone could help me.

In actionpack/lib/action_view/paths.rb, there is the following snippet:

def templates_in_path
  (Dir.glob("#{@path}/**/*/**") |
Dir.glob("#{@path}/**")).each do |file|
    unless File.directory?(file)
      yield Template.new(file.split("#{self}/").last, self)
    end
  end
end

That got me intrigued. What is the difference between
Dir.glob("#{@path}/**/*/**") | Dir.glob("#{@path}/**")
and just
Dir.glob("#{@path}/**")
?

Thanks, Rodrigo.


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On 9 Sep 2008, at 14:27, Rodrigo Rosenfeld Rosas wrote:
>
> I tried to ask this question once in Ruby-talk and inside another  
> post in
> this list. No one answered me and I doubt anyone is able to answer it.
>
> So, I tried changing the subject in a weird, although correct  
> question, to
> see if someone could help me.
>
> In actionpack/lib/action_view/paths.rb, there is the following  
> snippet:
>
> def templates_in_path
>   (Dir.glob("#{@path}/**/*/**") |
Dir.glob("#{@path}/**")).each do |
> file|
>     unless File.directory?(file)
>       yield Template.new(file.split("#{self}/").last, self)
>     end
>   end
> end
>
> That got me intrigued. What is the difference between
> Dir.glob("#{@path}/**/*/**") | Dir.glob("#{@path}/**")
> and just
Did you try running them ? Two minutes in the console seems to  
indicate that "#{@path}/**/*/**" matches files inside those folders as
many levels down as you want

whereas "#{@path}/** just lists those folders in @path

Fred
>
> Dir.glob("#{@path}/**")
>
> ?
>
> Thanks, Rodrigo.
>
>
> >

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Frederick Cheung wrote:
> 
> 
> On 9 Sep 2008, at 14:27, Rodrigo Rosenfeld Rosas wrote:
> 
>>
>> I tried to ask this question once in Ruby-talk and inside another
>> post in
>> this list. No one answered me and I doubt anyone is able to answer it.
>>
>> So, I tried changing the subject in a weird, although correct
>> question, to
>> see if someone could help me.
>>
>> In actionpack/lib/action_view/paths.rb, there is the following
>> snippet:
>>
>> def templates_in_path
>>   (Dir.glob("#{@path}/**/*/**") |
Dir.glob("#{@path}/**")).each do |
>> file|
>>     unless File.directory?(file)
>>       yield Template.new(file.split("#{self}/").last, self)
>>     end
>>   end
>> end
>>
>> That got me intrigued. What is the difference between
>> Dir.glob("#{@path}/**/*/**") |
Dir.glob("#{@path}/**")
>> and just
> 
> Did you try running them ? Two minutes in the console seems to
> indicate that "#{@path}/**/*/**" matches files inside those
folders as
> many levels down as you want
> 
> whereas "#{@path}/** just lists those folders in @path
> 
> Fred
Ok, I got, they are different. But playing a bit more with glob, I found out
that (or, at least, it seems to):

Dir.glob("#{@path}/**") == Dir.glob("#{@path}/*")

and 
(Dir.glob("#{@path}/**/*/**") | Dir.glob("#{@path}/**"))
=(Dir.glob("#{@path}/**/*/**") | Dir.glob("#{@path}/*"))
=Dir.glob("#{@path}/**/*")

Except for order. To be sure, try this:
(Dir.glob("#{@path}/**/*/**") | Dir.glob("#{@path}/*")).sort
=Dir.glob("#{@path}/**/*")Dir.glob("#{@path}/**/*").sort

So, I would change my question:

Wouldn''t 
Dir.glob("#{@path}/**/*")
be a better replacement to 
Dir.glob("#{@path}/**/*/**") | Dir.glob("#{@path}/**")
?

Rodrigo.




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