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Re: simple substitution?

X-seq: zsh-users 14299
From: Andrey Borzenkov <arvidjaar@xxxxxxxxx>
To: zsh-users@xxxxxxxxxx, tartifola@xxxxxxxxx
Subject: Re: simple substitution?
Date: Wed, 12 Aug 2009 15:56:26 +0400
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On Wednesday 12 of August 2009 15:39:16 tartifola@xxxxxxxxx wrote:
> Hi,
> I'm trying to understand expansion end substitution and I'm lost in
> what should be a simple substitution. Here my example
>
> >foo=4
> >echo ${foo}
>
> 4
>
> >FO=fo
> >O=o
> >echo \${${FO}${O}}
>
> ${foo}
>

Try

echo ${(P)${:-${FO}${O}}}

Recursive expansion never was a simple thing :)

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References:
- simple substitution?
  - From: tartifola

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