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Effect of typeset -U for colon separated paths?
- X-seq: zsh-users 4536
- From: Hannu Koivisto <azure@xxxxxx>
- To: Zsh Users' List <zsh-users@xxxxxxxxxxxxxx>
- Subject: Effect of typeset -U for colon separated paths?
- Date: Fri, 14 Dec 2001 15:00:30 +0200
- Mail-copies-to: nobody
- Mailing-list: contact zsh-users-help@xxxxxxxxxx; run by ezmlm
- Sender: Hannu Koivisto <Hannu.Koivisto@xxxxxxxxxxx>
Greetings,
I have few other colon separated paths in addition to PATH and
MANPATH that need to be managed in a similar fashion. In PATH's
and MANPATH's case I can avoid duplicates by saying "typeset -U
path manpath" because PATH and MANPATH are special in that they
mirror array parameters path and manpath, respectively. I couldn't
find any way to establish similar mirroring for arbitrary
variables, though, so I need to get rid of duplicates manually. I
thought about creating a temporary array, let's call it "foo",
declare its elements unique and then split elements of my colon
separated variables into it and join them back. Unfortunately I
couldn't get splitting to work. I tried...
BAR=foo:bar:baz
foo=(${(s:::)BAR}
...but s expansion flag couldn't split with plain ":" (for
understandable reasons). I couldn't figure out any working way to
quote it either. How should such splitting be done? Or are there
alternative, easier ways of getting rid of duplicates in colon
separated paths?
--
Hannu
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