From: Robert Dober <robert.dober@...>
Date: 2007-06-30T20:36:09+09:00
Subject: Re: patten match

On 6/19/07, geetha <sangeetha.geethu05@gmail.com> wrote:
> Hi Good morning,
>
>       I am having one text file. In this I need to remove all the new lines
> and I need to match the keyword what I am giving.
>
> Please any one help me....
>
> Thanks,
> S.Sangeetha.

Hmm removing the newlines can be done in different ways, I'll show you
one below.
However it is not clear to me what you mean by matching keywords, as a
sample application I will replace the keyword by _keyword_, but maybe
you shall ask again.

def remove_nl_and_kw file_name, key_word="ruby"
   File.readlines(file_name).
     map{|line| line.chomp}.
     gsub(key_word, "_" << key_word << "_").
     join

end

If you had the newlines removed because keywords might spwan lines you
have to put join in front of gsub, but that might become a performance
nightmare for larger files as you will be calling gsub on *huge*
strings.

HTH
Robert

-- 
I always knew that one day Smalltalk would replace Java.
I just didn't know it would be called Ruby
-- Kent Beck