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Re: [[ ]] and [ ] tests not using the same ordering for strings.
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From: |
Chet Ramey |
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Subject: |
Re: [[ ]] and [ ] tests not using the same ordering for strings. |
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Date: |
Tue, 30 Jul 2013 14:18:40 -0400 |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:17.0) Gecko/20130509 Thunderbird/17.0.6 |
On 7/30/13 6:00 AM, Jesper Brix Rosenkilde wrote:
> Bash Version: 4.2
> Patch Level: 45
> Release Status: release
>
> Description:
> When comparing ' a' with '0a' using the less than operator, using [ ] and
> [[ ]] tests respectively gives different results.
>
> Repeat-By:
> [ ' a' \< '0a' ] && echo ok
> [[ ' a' < '0a' ]] && echo ok
Yes. The description of the [[ command says
When used with [[, the < and > operators sort lexicographically
using the current locale.
The description that appears in the `CONDITIONAL EXPRESSIONS' section says:
When used with [[, the < and > operators sort lexicographically
using the current locale. The test command sorts using ASCII
ordering.
Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU chet@case.edu http://cnswww.cns.cwru.edu/~chet/