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Re: Is this right? test -v $hash{defined_value} == false?
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From: |
Charles Daffern |
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Subject: |
Re: Is this right? test -v $hash{defined_value} == false? |
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Date: |
Mon, 13 Jul 2015 07:04:00 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.0.1 |
On 13/07/15 04:58, Linda Walsh wrote:
>> [[ -v hash[defined_value] ]] || echo fail
> fail
This one worked for me, both bare and in quotes.
>> echo $BASH_VERSION
> 4.2.45(1)-release
I'm on 4.3.39(1)-release
> This seems more messy and isn't -v supposed
> to help clean up such things?
>> [[ ${hash[defined_value]:-""} ]] || echo fail #it passes
>> [[ ${hash[defined_value1]:-""} ]] || echo fail
> fail
In non-bash shells I will usually use [ -n "${var+x}" ], because it
distinguishes between empty and unset variables.
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