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Is ${} supported?

X-seq: zsh-workers 2490
From: Anthony Heading <aheading@xxxxxxxxxxxx>
To: zsh-workers@xxxxxxxxxxxxxxx
Subject: Is ${} supported?
Date: Wed, 27 Nov 1996 09:20:41 +0000 (GMT)

The "null" parameter seems useful to allow the following sort of thing:

% echo ${(j/+/):-{one,two,three}}
one+two+three

But does it only work by accident, or can it be relied on?  Should
it be documented?

Anthony

Follow-Ups:
- Re: Is ${} supported?
  - From: Zoltan Hidvegi

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