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Re: Documentation about destroying an array element


From: Chet Ramey
Subject: Re: Documentation about destroying an array element
Date: Thu, 15 Aug 2019 10:16:49 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:60.0) Gecko/20100101 Thunderbird/60.8.0

On 8/15/19 9:18 AM, Greg Wooledge wrote:
> On Thu, Aug 15, 2019 at 12:37:01PM +0300, address@hidden wrote:
>> https://www.gnu.org/software/bash/manual/html_node/Arrays.html tells
>> "unset name[subscript] destroys the array element at index subscript."
>>
>> But if there is a file named names, nameu ,nameb, namec, namer, namei, namep
>> or namet in currenct directory, that does not work, unless globbing is
>> disabled (set -o noglob).
>>
>> So quoting should be stressed in the manual.
>>
>> BASH_VERSION 4.4.20(1)-release
> 
> It actually *is* mentioned in the manual, in 4.4.  But that sentence was
> removed in version 5.0 for some reason.

That sentence was removed and replaced with an entire paragraph:

"When  using  a  variable name with a subscript as an argument to a com-
mand, such as with unset,  without  using  the  word  expansion  syntax
described  above,  the  argument  is subject to pathname expansion.  If
pathname expansion is not desired, the argument should be quoted."

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



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