From: Eric Boucher <devlists-ruby-talk@...>
Date: 2006-04-28T07:20:57+09:00
Subject: getting the next line with the iterator

Hi,

I would like to know if there is a ruby way to achieve what I want to  
do. I want to be able to access the next iterator while reading a file.  
Basically, I want to be able to collect the next 3 lines when I  
encounter a certain line:

list = []

File.open('toto.txt', 'rb') do |myFile|
	myFile.each {|line|

    	    if line =~ /regExp/
    	        list << line.nextIterator
    	        list << line.nextIterator
    	        list << line.nextIterator
    	    end
	}
end
puts list


This code is not working, I know. The method "nextIterator" doesn't  
exist. This is the way I see it, but I don't know how to do it. I think  
that you can invode the method "next" on iterators in Python. I don't  
know how to do that without invoking the command 'next' with a flag and  
a counter, a little bit like this code (which is not very rubyist):

list = []
flagIn = false
counter = 3

File.open('toto.txt', 'rb') do |myFile|
    myFile.each {|line|

        if line =~ /regExp/i
            flagIn = true
            next
        end

        if flagIn
            list << line
            counter -= 1
            flagIn = false if counter == 0
        end
    }
end
puts list


Any suggestions?

Thanks
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