From: Andreas Hansen <hansenandr@...>
Date: 2009-06-25T23:39:53+09:00
Subject: Re: regex that works on rubular.com but not in my program

its the first time me or my friend has worked with regex, my friend have 
rewritten the regex a bit, maybe it makes more sense now:

(?#start: fetch the ip adress after IP)
IP\s((?:\d*\.) {3}\d{1,3})
(?#end: fetch ip)

(?#start: flag).*:\s([PSF])(?#end:flag) (?#nothing more interesting on 
this line)
.*$(?#end)

(?#start: look for index pattern)
\s^E.{5}@.{9}Q.{30,42}
(?#end: index)

(?#start: get the username which is surrounded by multiple dots, minimum 
of 2 in the begining and 0+ after)
.*\.{2,}([\w](?:\w+.){1,13}\w)\.*
(?#end: username)

Each of those expressions works individually and together(in rubular)
but when i combine them in my program it prints nothing, not even nil.
So i tried them individually in the program as well and all but the 
index pattern(prints nothing) works. so if anyone could offer some 
insight why its not working or knows a better way to do this we卒ll be 
very happy:)

another thing:
some usernames are really hard to extract from the packets. an example:
G-eX.Dowden(http://rubular.com/regexes/8401)
any suggestions?


File.foreach filename do |line|
  b = line.scan rx
  puts b.length
end

was a nice solution, thank you:)

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