From: Peter Stephenson <email@example.com>
Subject: Re: Subscript flag (i) not working correctly on empty strings?
Date: Sun, 08 Jan 2023 19:47:32 +0000 [thread overview]
Message-ID: <firstname.lastname@example.org> (raw)
On Fri, 2023-01-06 at 10:12 -0800, Bart Schaefer wrote:
> On Fri, Jan 6, 2023 at 9:24 AM Peter Stephenson
> <email@example.com> wrote:
> > > On 06/01/2023 16:01 Philippe Altherr <firstname.lastname@example.org> wrote:
> > >
> > > > s=; echo $s[(i)z];
> > > > 0
> > >
> > > Why is the last line 0 and not 1?
> > Certainly looks plain wrong.
> > None of the existing tests fail with this change.
> I thought there was a discussion about this at some point in the past
> ... but it may have been limited to array cases. I have the feeling
> we concluded that (i) and (I) should produce the same result on empty
> string for purposes of boolean tests, but I can't find such a
> conversation in the archives.
Can you think of any piece of shell code that might rely on this,
in the absence of any historical corpus? As far as I can see
this is a plain misuse of (i), which isn't there for boolean tests.
This doesn't feel to me like a big issue anyway and in the absence of a
clear cut reason I would think consistency should triumph.
prev parent reply other threads:[~2023-01-08 19:48 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-06 16:01 Philippe Altherr
2023-01-06 17:23 ` Peter Stephenson
2023-01-06 18:12 ` Bart Schaefer
2023-01-07 13:45 ` Philippe Altherr
2023-01-07 13:52 ` Roman Perepelitsa
2023-01-07 13:54 ` Roman Perepelitsa
2023-01-08 19:47 ` Peter Stephenson [this message]
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