From: Clement Ow <clement.ow@...>
Date: 2008-04-23T12:48:32+09:00
Subject: Extract date from filenames using regex

I have my code which looks like this:
>>   delete= 5 + 2 #escape counting in weekends i.e Sat,Sun
>>   folders = $del_path
>>    puts delete_date = DateTime.now - delete

>>    regexp = Regexp.compile(/(\d{4}\d{2}\d{2})/)

>>    fileData = Struct.new(:name, :size)
>>    deleted_files = []

>>   folders.each do |folder|
>>      Dir.glob(folder+"/*") do |file|
>>        match = regexp.match(File.basename(file));
>>        if match
>>          file_date = DateTime.parse(match[1])
When my file name is in the format, 20080331 for example, the script
will run successfully. However, if the filename has additional
characters added to it, say, risk20080331, it'll run an error. And i
reckon it's the cause of the above line.

>>          size = (File.size(file))/1024
>>          if delete_date > file_date
>>            deleted_files << fileData.new(file,size)
>>            FileUtils.rm_r file

>>            if File.exist?(file)==false
>>              puts "Files/Folders deleted: #{file} size: #{size} KB"
>>              end #if
>>            end #if
>>        end #if
>>      end #do
>>    end #each
>>  end #if

So is there any way I can extract the date using regex or whichever way
simpler so I can compare the deletion date and execute the rm_r command?
Thanks!
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