From: Robert Klemme <shortcutter@...>
Date: 2006-10-22T22:05:18+09:00
Subject: Re: What is wrong with my code


Li Chen wrote:

> Hi folks,
> 
> I write two srcipts to check  files in a given directory. Version 1 uses 
> regular expression  and works but I cann't find the size for each file. 
> Version 2 uses Ruby built-in File.file? method but it doesn't work at 
> all. I wonder what is going on with my scripts?

So you want to sum sizes of all files in a directory hierarchy whose 
names match a certain pattern.  The pattern you use cannot be used with 
Dir[] for filtering.  So you better use find:

sum = 0
Find.find(path) do |f|
   sum += File.size(f) if
     /(\w+|d+).(\d{3,})/ =~ File.basename(f) && File.file?(f)
end

Note, your regexp might not match what you actually think it matches. 
At the moment you match all file names that contain (!) at least a 
single digit or word character followed by any character and then at 
least three digits.  I am guessing here but do you maybe rather want all 
files that have a purely numeric file extension?  In that case this 
regexp would be better

/\.\d+$/

Regards

	robert