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Re: Is this right? test -v $hash{defined_value} == false?


From: Chet Ramey
Subject: Re: Is this right? test -v $hash{defined_value} == false?
Date: Mon, 13 Jul 2015 09:03:43 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.7.0

On 7/12/15 11:58 PM, Linda Walsh wrote:
>>  set -A hash

This is an error.

>>  hash=([defined_value]=22)

This creates an indexed array.

>>  echo ${hash[defined_value]}
> 22
>>  [[ -v ${hash[defined_value]} ]] && echo pass

test/[/[[ -v didn't understand array variables and subscripts until bash-4.3.

>>  echo $BASH_VERSION
> 4.2.45(1)-release

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



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