From: Sebastian Stark <seb-zsh@biskalar.de>
To: zsh-users@zsh.org
Subject: double quoted expansion question
Date: Fri, 7 Sep 2012 14:31:38 +0200 [thread overview]
Message-ID: <29236168-55B5-4555-9ACA-B1D21D345EA9@biskalar.de> (raw)
Dear zsh users,
I am trying to make a unique list of tags that is given in a string with a certain format, e. g.:
servers="
madeira linux,gpu,users
madeira2 linux,gpu,users
smtp linux,mail,smtp
isar linux,users
easygwa linux,web,external
"
The format is: server name, space, tag, comma, tag, comma, tag ...
What I want from the above list is this:
external gpu linux mail smtp users web
and I get it with:
print ${(s:,:uo)${(j:,:)${${(f)servers}//* /}}}
However, if I do this:
print "${(s:,:uo)${(j:,:)${${(f)servers}//* /}}}"
I get:
external linux web
This also happens when I use the variable expansion expression in a here document, which, I suppose, is undergoing the same treatment as double quoted strings.
What I would like to understand here is why the output changes the way it does when I add double quotes around my expression. I would expect the same output as without. If anybody could shed some light please, I guess it's just something obvious I cannot see.
Sebastian
next reply other threads:[~2012-09-07 12:31 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-07 12:31 Sebastian Stark [this message]
2012-09-07 12:47 ` Jérémie Roquet
2012-09-07 12:54 ` Jérémie Roquet
2012-09-07 14:36 ` Sebastian Stark
2012-09-07 14:41 ` Bart Schaefer
2012-09-07 15:43 ` Sebastian Stark
2012-09-08 5:38 ` Bart Schaefer
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