From: Dave Thomas <dave@...>
Date: 2003-12-16T07:29:09+09:00
Subject: Re: Extracting multiple lines from a file


On Dec 15, 2003, at 16:16, Ron Coutts wrote:
> file = File.open("ordinal")
> while file.gets
>   print if /third/ .. /fifth/
> End
>
> Unfortunately this code snippet is buggy as it prints out all ten lines
> of the file, not just lines three through five as mentioned in the 
> book.
>
Yeah - Ruby 1.8 changed this. You could try

file = File.open("ordinal")
while line = file.gets
   print if line =~ /3/.. line =~ /5/
end

If the file is a reasonable size, if might be easier to do

content = File.read("ordinal")
content.scan(/^START(.*?)^END/m) do |match,|
   p match
end

This reads in the whole file, then calls the block passing in the 
chunks of it between START and END.


Cheers


Dave
Cheers

Dave