From: Bart Schaefer <schaefer@brasslantern.com>
To: limited time <burnermail4now@gmail.com>
Cc: zsh-workers@zsh.org
Subject: Re: Inconsistent behavior of the test command with associative arrays
Date: Wed, 17 Apr 2024 15:13:31 -0700 [thread overview]
Message-ID: <CAH+w=7Yx5qfwrGYzC_p=dP=1fZsWOXZrM1a-adVCieEjK1vdyg@mail.gmail.com> (raw)
In-Reply-To: <143C3C91-0198-4D62-8B81-9830CA7DB649@gmail.com>
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This doesn't have anything to do with associative arrays and everything to
do with "test" and quoting.
On Wed, Apr 17, 2024 at 2:37 PM limited time <burnermail4now@gmail.com>
wrote:
> % zsh -f
> % typeset -A array=(key1 value1 key2 value2);
> test $array[key1] ; echo $? ;
> test $array[key2] ; echo $? ;
>
These two are "test somestring" which is defined as true.
> test $array[key3] ; echo $? ;
> test $array[key4] ; echo $? ;
>
These two are just "test" (with no arguments at all, because key3 and key4
have no value) which is defined as false.
> if test $array[key1] -a $array[key2] ; then
> echo "Condition evaluated to true" ;
> fi
>
This is "test string -a string" which is true because neither string is
empty.
> if test $array[key3] -a $array[key4] ; then
> echo "Condition evaluated to true" ;
> fi
>
This is "test -a" because both expansions are empty and not quoted so they
disappear from the command line entirely.
By definition, "test -a" is treated as "test somestring" and is true.
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prev parent reply other threads:[~2024-04-17 22:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-17 21:37 limited time
2024-04-17 22:13 ` Bart Schaefer [this message]
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