From: Robert Dober <robert.dober@...>
Date: 2007-07-11T20:12:33+09:00
Subject: Re: if / else, how to include next line

On 7/11/07, Marc Hoeppner <marc.hoeppner@molbio.su.se> wrote:
>
> >
> > count = 0
> > ARGF.each do |line|   ## treating a line at turn
> >     puts line unless count.zero?
> >     count = [0, count-1].max
> >     if line =~ /your keyword or something/ then
> >        puts line
> >        count = 8
> >    end
> > end
> >
>
> Ok, I started with this one, but run into one problem - again probably
> simple...
> The way this is written it asks for a regexp as a keyword. Now, I do
> have a text file, in which I have a number of key words, one in each
> line. What I wasnt able to figure out thus far was how to change the
> above code so that it would expect a variable instead of a regexp.
>
> When I defined a variable within the code var1 = 'KOG0019' and tried to

I had no idea what you wanted exactly, here are some possibilites
(a) always the same string
if line == "KOG0019"
(b) containing the same string
if line =~ /KOG0019/
or my favorite idiom
if /KOG0019/ === line
(c) KOG followed by digits something
if /KOG\d+/ === line
(d) KOG and exactly 4 digits
if /KOG\d{4}/ === line
(e) KOG and some digits with no more text thereafter
if /KOG\d+\s*$/ === line

This should get you going;) if not try to learn more about Regexps; by
scanning this list or reading the perl man page about regexps (the
baisc stuff is the same and gets you a long way already). The ultimate
guide seems to be Friedl's "Mastering Regular Expressions".

Cheers
Robert

> use it as an argument ala if = var1 then it did something..., but
> instead of finding the corresponding line and copying the following at
> lines it copies like 12000 lines and puts the keyword in every second
> line...
>
> /Marc
>
> --
> Posted via http://www.ruby-forum.com/.
>
>


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