[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: ${var@Q}: don't quote unless necessary?
|
From: |
Chet Ramey |
|
Subject: |
Re: ${var@Q}: don't quote unless necessary? |
|
Date: |
Mon, 30 Oct 2017 09:50:03 -0400 |
|
User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:52.0) Gecko/20100101 Thunderbird/52.4.0 |
On 10/29/17 10:48 PM, Clark Wang wrote:
> See following example:
>
> [STEP 100] # echo $BASH_VERSION
> 4.4.12(2)-release
> [STEP 101] # v=abc
> [STEP 102] # printf '%q\n' $v
> abc
> [STEP 103] # printf '%s\n' "${v@Q}"
> 'abc'
> [STEP 104] #
>
> Is it possible to not quote the result since there's no special chars in
> the string? I would expect ${var@Q} to produce more concise result compared
> to `printf %q' since it's the new syntax. :)
The ${var@Q} syntax always quotes; that's why it exists in the first place.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU chet@case.edu http://cnswww.cns.cwru.edu/~chet/