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Re: Negative array subscript with unset
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From: |
Chet Ramey |
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Subject: |
Re: Negative array subscript with unset |
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Date: |
Sat, 12 Mar 2011 21:50:31 -0500 |
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User-agent: |
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.13) Gecko/20101207 Lightning/1.0b2 Thunderbird/3.1.7 |
On 3/12/11 7:21 PM, Chris F.A. Johnson wrote:
>
> I all versions I have tried, unsetting an array element using a
> negative index fails:
>
> $ array=( q w e r t y )
> $ unset 'array[-1]'
> bash: [-1]: bad array subscript
Negative subscripts only work with ${parameter[subscript]}. The problem
is that I put the text in the manual page describing their use in the
wrong place. It should have gone in the paragraph describing array
references.
Negative subscripts will work in more contexts in the next version of bash.
Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU chet@case.edu http://cnswww.cns.cwru.edu/~chet/