On 28.09.2008 10:46, Robert Klemme wrote:
> If you use a Hash you can do something like this (proper variable naming 
> goes a long way in making this readable and understandable):
> 
> counters = Hash.new 0
> 
> ARGF.each do |line|
>   line_class = line[/\b(?:IN|OUT|PP|AA)\b/]
>   raise "Unknown rule" unless line_class
>   print counters[line_class] += 1, " ", line
> end

PS: Forgot to mention that you may have to adjust the regexp matching to 
be more robust.  In your case you may want to do

line_class = line[/^access-list\s+(IN|OUT|PP|AA)\b/, 1]

Cheers

	robert