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Re: [Help-bash] What keys are not allowed in an associative array?
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From: |
Greg Wooledge |
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Subject: |
Re: [Help-bash] What keys are not allowed in an associative array? |
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Date: |
Mon, 11 Jun 2018 08:25:57 -0400 |
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User-agent: |
NeoMutt/20170113 (1.7.2) |
On Sat, Jun 09, 2018 at 06:03:31PM -0500, Peng Yu wrote:
> I see @ and * are not allowed. Is there anything else that is not allowed?
The empty string is not allowed. As far as I know, that's the only one.
@ and * are allowed, if properly quoted.
wooledg:~$ declare -A aa
wooledg:~$ aa[""]=foo
bash-5.0: aa[""]: bad array subscript
wooledg:~$ aa["@"]=foo
wooledg:~$ declare -p aa
declare -A aa=(["@"]="foo" )