From: Pier Paolo Grassi <pierpaolog@gmail.com>
To: Peter Stephenson <p.stephenson@samsung.com>
Cc: Zsh-Users List <zsh-users@zsh.org>
Subject: Re: variable expansion inside string
Date: Tue, 30 Jul 2019 16:02:17 +0200 [thread overview]
Message-ID: <CAP+y1xBYuRoak6C07rP__sy6ycm2UF_SdChAH4_YvHCkGjGMEQ@mail.gmail.com> (raw)
In-Reply-To: <1564492687.5815.4.camel@samsung.com>
[-- Attachment #1: Type: text/plain, Size: 1406 bytes --]
thank you Peter, I made a mistake in the example code:
file="filename.txt"
a="*$file*"
should have been:
file="filename.txt"
a='*$file*'
with single quotes the behaviour is changed:
zsh -fc 'file= filename.txt; a="*$file*"; print "$a"'
gives:
*filename.txt*
instead with single quotes:
zsh -fc 'file= filename.txt; a=''*$file*''; print "$a"'
gives
*$file*
I would like the second example to somehow give the result of the first,
since I am trying to pass the string from another context where the
variable $file is not already defined
thanks
Pier Paolo Grassi
linkedin: https://www.linkedin.com/in/pier-paolo-grassi-19300217
founder: https://www.meetup.com/it-IT/Machine-Learning-TO
Il giorno mar 30 lug 2019 alle ore 15:19 Peter Stephenson <
p.stephenson@samsung.com> ha scritto:
> On Tue, 2019-07-30 at 14:28 +0200, Pier Paolo Grassi wrote:
> > Hello, is it possibile to do only variable expansion inside a string, eg:
> >
> > file="filename.txt"
> > a="*$file*"
>
> If you run zsh -f, you'll see that that's exactly what you normally get,
> just
> by running
>
> print "$a"
>
> --- no eval.
>
> My best guess is you have the option globsubst set and when you tried
> to print the result, you didn't use double quotes at that point, i.e.
> you had something like
>
> print $a
>
> and the *filename.text* got expanded at that point.
>
> So the original code is actually fine.
>
> pws
>
>
next prev parent reply other threads:[~2019-07-30 14:03 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20190730123021epcas1p21671587b575bd82a2512bcb1fa091563@epcas1p2.samsung.com>
2019-07-30 12:28 ` Pier Paolo Grassi
2019-07-30 13:18 ` Peter Stephenson
2019-07-30 14:02 ` Pier Paolo Grassi [this message]
2019-07-30 14:15 ` Peter Stephenson
2019-07-30 14:23 ` Peter Stephenson
2019-07-30 14:55 ` Pier Paolo Grassi
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