From: Albert Schlef <albertschlef@...>
Date: 2010-02-05T09:25:05+09:00
Subject: Re: Refining the use of file joins or file expand_path

Alpha Blue wrote:
> The question I have (because I have written used both) is which would
> "you" use and why keeping the following in mind...
> 
> Dir[File.join(File.dirname(__FILE__),"..","ui","*.rb")].each {|rb_files|
> load rb_files}

BTW, there's an alternative to explicit use of File.join() which makes 
the code more aesthetic:

To define String#/, like  this:

  class String
    def /(o)
      File.join(self, o.to_s)
    end
  end

and then you can do:

  Dir[File.dirname(__FILE__) / ".." / "ui" / "*.rb"]

or even:

  Dir[File.dirname(__FILE__) / ".." / :some / :path / "*.rb"]

I once investigated whether File.join() is needed and got the impression 
that one can just use '/' and things would work. Also, see this:

http://rubyforge.org/tracker/index.php?func=detail&aid=13026&group_id=426&atid=1698

Yet I see some Ruby gurus using File.join().

>
> Dir[File.join(File.dirname(__FILE__),"..","ui","*.rb")].each {|rb_files|
> load rb_files}

There's a problem in this approach: if you have a class the inherits 
from a base class, you need to load the base class first. Dir[] gives 
you random order(?), which is bad.

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