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Re: Should [[ -v 1 ]] be supported?


From: Chet Ramey
Subject: Re: Should [[ -v 1 ]] be supported?
Date: Thu, 27 Dec 2018 13:22:15 -0500
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:52.0) Gecko/20100101 Thunderbird/52.9.1

On 12/26/18 10:49 PM, Peng Yu wrote:

> Although [[ -z ${1+s} ]]  and (($#)) works for testing if $1 is set,
> neither of them are uniformly better performance wise. In this case,
> should [[ -v 1 ]] be supported?

So you're saying that neither of the existing options performs better
than the other, though they both perform well, so we should add some
new capability just because? That's a particularly poor argument.


-- 
``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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