From: Robert Dober <robert.dober@...>
Date: 2007-07-02T03:09:29+09:00
Subject: Re: awk regexp search

On 7/1/07, baptiste Augui� <ba208@exeter.ac.uk> wrote:
> > ruby -ane 'puts $F[3] if /scattering efficency/' ../ton/beau/fichier
> >
> > does the same as the awk script above
> >
>
> this piece of code needs to be part of a script, not a one line call -
>  > how would that work in a Ruby script?
I am not sure I understand, this command can be put into a bash script
as the awk example above, if however you want to replace the bash
script by a Ruby script it will be necessary to read the File
explicitly

puts File.readlines("/le/beau/fichier"/).grep(/scattering efficency/).
    map{|line| line.split[3]}

or only the first

puts File.readlines("/le/beau/fichier"/).grep(....).first.split[3]

or if performance is an issue and you do not want to read further lines

File.each("/le/grand/fichier") do
   |line|
   next unless /.../ === line
   puts line.split[3]
   break
end

Cheers
Robert
>
> > Side Remark:
> > domage que l'on ne puisse utiliser mes options pr�f�r�es: -anpe ;)
>
> ; )
>
>
> >
> >
> > Robert
>
> Thanks,
>
> baptiste
>
>
>


-- 
I always knew that one day Smalltalk would replace Java.
I just didn't know it would be called Ruby
-- Kent Beck