From: "Eric I." <rubytraining@...>
Date: 2008-08-11T13:22:43+09:00
Subject: Re: Expanding variables in a string

On Aug 11, 12:00 am, "Thind, Aman" <aman.th...@lehman.com> wrote:
> Hello,
>
> If I have a string containing variables, how can I expand them?
>
> I retrieve this string from a db so I cannot expand it at the time of
> assignment.
>
> Eg:
>
> myaction = 'perl #{ENV['HOME_SCRIPTS']}/myscript.pl -#{params[:date]}'
>
> I want to be able to do:
>
> system(myaction)
>
> but for this I have to expand the vars inside the script first.

Have you tried putting double quotes (rather than single quotes)
around the String in question?

v = "hello"
w = "1. #{v}"  # -> 1. hello
x = '2. #{v}'  # -> 2. #{v}

>
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Given all of that, I can't help but feel I've done something wrong by
daring to answer your question....  Please tell the Brothers Lehman
that I didn't mean to do it.  Please understand that when I crossed
the Brother Ringling, I returned home one evening to find a clown's
nose in my bed, so I'm a little skittish.

Eric

====

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