From: John Joyce <dangerwillrobinsondanger@...>
Date: 2007-07-11T18:00:03+09:00
Subject: Re: if / else, how to include next line


On Jul 11, 2007, at 3:35 AM, Marc Hoeppner wrote:

>
> Hi everyone,
>
> absolute beginner here, so bare with me ;)
>
> The following issue came up and I can't figure out how to solve.
> Probably nothing very complicated, tho.
>
> I want to load a text file via ARGV[0] and then search it for a key
> word. If this key word is found, it should be printed (puts) and...and
> this is very I am stuck ...it should also included the next 8  
> lines. The
> file structure looks like this:
>
> KOG0003
>  Sc             000000000
>  Dr             000000000
>  Ar             001010011
>  Ca             000100100
>  Ho             001010010
>  Sa             010000000
>  An             100000100
>  Pl             000001000
> KOG0009
>  Sc             000100
>  Dr             100000
>  Ar             001001
>  Ca             101000
>  Ho             101010
>  Sa             010000
>  An             100000
>  Pl             001000
>
> So lets say I want to select for a specific KOG (or a list of KOGs)  
> and
> write them together with the associated lines into a new file. I guess
> the issue at the moment is, that when I open the ARGV[0], it reads one
> line at a time - cant quite figure out how to include the "go to next
> line and puts it, too" part.
>
> Any help pointing me in the right direction would be greatly  
> appreciated
>
> /Marc
>
> -- 
> Posted via http://www.ruby-forum.com/.
>

You can use a heredoc to maintain all the whitespace.
Here's some info:
http://blog.jayfields.com/2006/12/ruby-multiline-strings-here-doc- 
or.html
Then just assign the heredoc to a variable
last_8_lines = <<-heredoc_ender
KOG0003
  Sc             000000000
  Dr             000000000
  Ar             001010011
  Ca             000100100
  Ho             001010010
  Sa             010000000
  An             100000100
  Pl             000001000
KOG0009
  Sc             000100
  Dr             100000
  Ar             001001
  Ca             101000
  Ho             101010
  Sa             010000
  An             100000
  Pl             001000
heredoc_ender

When you want to use it, just :
puts last_8_lines

You can also use string interpolation with heredocs


#{keyword_string}

John Joyce