From: Trochalakis Christos <yatiohi@...>
Date: 2007-06-06T19:55:08+09:00
Subject: efficient regex scanning

Hello there,

I wan't to extract all the words from a file and so i wrote the
following code:

file = ARGV[0]
File.open('output','w') {|f|
        IO.read(file).scan(/\w+/).each{|w| f.print w}
}

The problem with this code is that it stores all the words in an array
which is not so good in terms of efficiency.
Is there a better way to do it?
Something like IO.read(file).each_scan { foo }

Thanks
Christos