From: MonkeeSage <MonkeeSage@...>
Date: 2007-12-07T10:04:59+09:00
Subject: Re: Capturing STDOUT from a system call (POSIX) into an array

On Dec 6, 10:45 am, Venks <venkatesh.man...@gmail.com> wrote:
> Thanks.
>
> Unfortunately I learned the hard way that if I use back ticks to
> execute an external command STDERR is not captured. I need to check
> the status of the command before proceeding. I am looking into
> "systemu" library as I may need to use threads as part of this
> development process.
>
> On Dec 6, 2007 11:10 AM, Ken Bloom <kbl...@gmail.com> wrote:
>
> > On Wed, 05 Dec 2007 19:38:35 -0500, Venks wrote:
>
> > > Thanks for your quick reply. I realize that you don't even need to use
> > > split. What I am missing is how to create a 2 dimensional array with
> > > each line contents in an array assuming that they are separated by a
> > > COMMA.
>
> > > Let me be more specific. Assume that we have a file under /tmp/test.txt
> > > with the following contents.
>
> > > aaa, 10, test1
> > > bbb, 20, test2
> > > ccc, 30, test3
> > > ddd, 40, test4
>
> > > I want to create a 2 dimensional array with each line being an array.
>
> > > lines = `cat /tmp/test.txt` will create a single dimensional array by
> > > default.
>
> > `cat /tmp/test.txt` will create a single string.
>
> > require 'csv'
> > nested_arrays=CSV.parse(`cat /tmp/test.txt`)
>
> > --Ken
>
> > --
> > Ken (Chanoch) Bloom. PhD candidate. Linguistic Cognition Laboratory.
> > Department of Computer Science. Illinois Institute of Technology.
> >http://www.iit.edu/~kbloom1/

You can always use shell redirection to redirect stderr to stdout...

s = p `ls nonexistent_dir 2>&1`
p s
# => "ls: cannot access nonexistent_dir: No such file or directory\n"

Regards,
Jordan