From: Mikael Magnusson <mikachu@gmail.com>
To: Peter Stephenson <Peter.Stephenson@csr.com>
Cc: zsh-users@zsh.org
Subject: Re: [[ and [
Date: Tue, 6 Mar 2012 12:53:17 +0100 [thread overview]
Message-ID: <CAHYJk3QJatm5QM3BrEUEWK9BhDiWa6pa5hCCnm=9cYCcdbg6Dw@mail.gmail.com> (raw)
In-Reply-To: <20120306114404.359e1c9d@pwslap01u.europe.root.pri>
On 6 March 2012 12:44, Peter Stephenson <Peter.Stephenson@csr.com> wrote:
> On Tue, 6 Mar 2012 11:35:32 +0000
> Peter Stephenson <Peter.Stephenson@csr.com> wrote:
>> However,
>>
>> [[ $foo -eq "" ]]
>>
>> does exactly what it looks like it does
>
> Sigh. Sort of. [ ... -eq ...] and [[ ... -eq ... ]] are numeric tests,
> so if foo is a string of zeros it's not doing what it looks like. I
> should have said
>
> [ $foo = "" ]]
>
> and
>
> [[ $foo = "" ]]
>
> or
>
> [[ $foo == "" ]]
>
> I don't know why it's that way round, it seems a bit illogical (which is
> why Perl is the other way), but it always has been that way.
Incidentally, this is probably the most confusing error message ever,
% [ $foo == "" ]
zsh: = not found
--
Mikael Magnusson
next prev parent reply other threads:[~2012-03-06 12:00 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-04 2:36 sergio
2012-03-04 4:24 ` Bart Schaefer
2012-03-06 0:32 ` sergio
2012-03-06 6:05 ` Bart Schaefer
2012-03-06 11:05 ` sergio
2012-03-06 11:35 ` Peter Stephenson
2012-03-06 11:44 ` Peter Stephenson
2012-03-06 11:53 ` Mikael Magnusson [this message]
2012-03-07 9:02 ` Nadav Har'El
2012-03-07 9:05 ` Mikael Magnusson
2012-03-07 9:21 ` Nadav Har'El
2012-03-07 15:27 ` Bart Schaefer
2012-03-07 8:52 ` Nadav Har'El
2012-03-07 9:43 ` Peter Stephenson
2012-03-07 14:11 ` Nadav Har'El
2012-03-07 14:27 ` Peter Stephenson
2012-03-07 18:38 ` Mark
2012-03-06 16:16 ` sergio
2012-03-06 16:29 ` Peter Stephenson
2012-03-06 17:40 ` sergio
2012-03-07 8:12 ` Nadav Har'El
2012-03-04 4:50 ` Kurtis Rader
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