From: ChrisH <chris.hulan@...>
Date: 2007-04-18T00:20:14+09:00
Subject: Re: exec with string in variables?

On Apr 17, 10:53 am, Christian <o...@web.de> wrote:
> Hi,
>
> i have something like this and more in perl and would transform it to
> ruby.
> First i changed  system to exec and than the points  to plus , but the
> strings which are in the scalar's seems
> not be applied in the exec call , perhaps some special needs with
> quoting!?
>
> :perl
>     foreach $line(@methoden) {
>     system("$exe_path" .  "dti.exe -qb -t  -e$line  $dom_file
> $train_file   $modell_string" . "$line" . ".dti");
>     .................
>     }
>
> :ruby
>
> methoden.each  do  |line|
> exec("exe_path +  dti.exe -qb -t  -eline  dom_file train_file
> modell_string + line + .dti")
> .............
> end
>
> many thanks christian

String interpolation does this nicely:

methoden.each  do  |line|
 exec("#{exe_path}dti.exe -qb -t  -e#{line}  #{dom_file} #{train_file}
#{modell_string}#{line}.dti")
 .............
end