From: Paul Lutus <nospam@...>
Date: 2006-09-16T00:45:53+09:00
Subject: Re: Need help about Ruby with text file

Oscar Lok wrote:

/ ...

>> And now, on re-reading his first post, I can't tell whether he got that
>> result and didn't want it, or didn't get it and wanted it. Or ... got it
>> and wanted it, and thought he would mention it in passing.
> 
> Hi,Paul Lutus
> Thanks for your reply!
> 
> aabbcc
> ddeeff
> gghhii
> jjkkll
> 
> 2)I get the result like :-
> hh
> 
> * What I would like to do is :-
> 1) go through each line from the begin
> 2) compare "hh" each letter on each line
> 3) found the line number of "gghhii"
> 4) extract "hh" of it.

Please provide an example. I think you don't literally mean you want 'hh'
specifically, but these are meant to stand in for the actual characters you
want. Yes? Otherwise this would work:

-------------------------------------------

#!/usr/bin/ruby

data = File.read("example.txt")

n = 0

data.each do |line|
   test = line.sub(/..(..)../,"\\1")
   print "#{n}: #{test}\n" if test =~ /hh/
   n += 1
end

-------------------------------------------

Example file contains:

aabbcc
ddeeff
gghhii
jjkkll

Output:

2: hh

Conclusion? You simply must explain what you want, clearly enough that it
can be turned into code.

-- 
Paul Lutus
http://www.arachnoid.com