From: Shashank Date <shanko_date@...>
Date: 2006-04-28T07:35:55+09:00
Subject: Re: getting the next line with the iterator

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How about reading the enire file in an array, something like (untested code):
   
  arr = IO.readlines('toto.txt')
  list = []
  arr.each_with_index{|line,i| 
      if line =~ /regExp/
        list << line[i]
          list << line[i+1]
          list << line[i+2]
     end
  }
   
  This may not work as is, but will give you an idea ...
  HTH,
   
  -- shanko


Eric Boucher <devlists-ruby-talk@devlists.com> wrote:
  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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