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Re: Build a variable name from another variable?

X-seq: zsh-users 7014
From: Cosmo <cosmo@xxxxxxxxxx>
To: Omen Wild <Omen.Wild@xxxxxxxxxxxxx>
Subject: Re: Build a variable name from another variable?
Date: Fri, 23 Jan 2004 23:47:43 +0000
Cc: zsh users <zsh-users@xxxxxxxxxx>
In-reply-to: <20040123224220.GB3354@xxxxxxxxxxxxxxxxxxxxxxx>
Mailing-list: contact zsh-users-help@xxxxxxxxxx; run by ezmlm
Organization: IBM Informix
References: <20040123224220.GB3354@xxxxxxxxxxxxxxxxxxxxxxx>

Omen Wild wrote:




I am not totally sure what it is called, but I want to build a variable
name dynamically, from the contents of another variable.  That is, I
have:

----- Begin script -----
barcontents="bar contents"
baz="bar"

echo $barcontents # <---- effect I want
echo ${${baz}contents} # <---- how I want to get there
----- End script -----

I get this error: bad substitution

I think the answer involves the (P) flag, as in:
echo ${${(P)baz}contents}


Back in the old days, before these fancy complicated shells, I'd just do this:

eval echo \$${baz}contents

;-)




Cosmo

References:
- Build a variable name from another variable?
  - From: Omen Wild

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