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To: zsh-users@sunsite.dk
Subject: Parameter expansion only to existing filenames
From: Vin Shelton <shelton@icd.teradyne.com>
Organization: Teradyne, Inc
Date: Wed, 02 Jul 2003 13:18:55 -0400
Message-ID: <545n0fwvocg.fsf@icd.teradyne.com>
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I was recently re-reading the Zsh User Guide (Thanks, Peter!!) and I
started a few experiments.  One need I have that is as yet unfulfilled
is to combine a list of directories and list of files such that only
the ones which exist get listed.  Here's what I mean:

zsh -f
denver% echo $ZSH_VERSION
4.1.1
denver% mkdir a b c
denver% touch a/x b/y c/z
denver% dirs=(a b c)
denver% files=(x y z)
denver% print $^dirs/$^files
a/x a/y a/z b/x b/y b/z c/x c/y c/z

What I'd like to generate is:
a/x b/y c/z

GLOB_SUBST doesn't help:

denver% print $^~dirs/$~^files
a/x a/y a/z b/x b/y b/z c/x c/y c/z

Is this because there's are no patterns to glob?

Is there a clever way to generate the list I want?

Thanks in advance,
  Vin