From: Robert Dober <robert.dober@...>
Date: 2007-07-11T20:57:46+09:00
Subject: Re: if / else, how to include next line

On 7/11/07, Marc Hoeppner <marc.hoeppner@molbio.su.se> wrote:
> Hm, maybe I was in fact a bit vague here, sorry.
>
> I think grep will do the job (sometimes its just simpler than one
> expected...), but now just out of curiosity:
>
> I have one file, structured as shown above. It contains some 600
> "entries" (that is a KOG-number followed by 8 lines of information). Out
> of these 600-someting entries, I only need a particular subset. The
> information on which KOG-entries I need are in a second text file
> (basically the KOG-numbers, one in each line), like so:
>
> KOG0019
> KOG0101
> KOG0245
> etc
>
> Ideally,the program would read this keyword-file, store the information
> in a variable (an array, I guess) and then use this array to identify
> the entries in the "main" file and puts them into stdout.
>
> *scratches head*
>

Let us assume you call your prog like this

ruby extractor.rb <keynames> <data>

keynames = File.readlines( ARGV.shift )
key_hash = {} # a set
keynames.each do | line | key_hash[line.strip] = true  end

File.open(ARGV.first){  ## Preferable to assure automatic closure of file
   | f | ## that is the file we opened
   count =0
   f.each { |line|
      ...
     if key_hash[ line.strip ] then
       puts line
       count = 8
     end
   }
}

and maybe stick to "{...}" or "do ... end"
just wanted to show you both

Cheers
Robert
   }
}
>
> --
> Posted via http://www.ruby-forum.com/.
>
>


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