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Re: nullglob make unset on array member fail ?


From: Chet Ramey
Subject: Re: nullglob make unset on array member fail ?
Date: Mon, 23 Jan 2017 10:05:30 -0500
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:45.0) Gecko/20100101 Thunderbird/45.6.0

On 1/23/17 9:04 AM, admn ombres wrote:
> $ x=(x); echo address@hidden; shopt -s nullglob; unset x[0]; echo 
> address@hidden
> 1
> 1
> $ x=(x); echo address@hidden; shopt -u nullglob; unset x[0]; echo 
> address@hidden
> 1
> 0

`unset' is a builtin; its arguments are subject to all the shell word
expansions, including globbing.  If you don't want to take a chance on
the effects of globbing modifying the word, quote it.

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/



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