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Re: Where is the syntax of ${array[@]:1:2} described?
From: |
Chet Ramey |
Subject: |
Re: Where is the syntax of ${array[@]:1:2} described? |
Date: |
Thu, 08 Jul 2010 23:30:14 -0400 |
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Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.1.7) Gecko/20100111 Lightning/1.0b1 Thunderbird/3.0.1 |
On 7/8/10 10:27 PM, Peng Yu wrote:
> Hi,
>
> array=(a b c)
> echo ${array[@]:1:2}
>
>
> I'm looking for the document for the above usage. I checked the Arrays
> section of man bash, but I don't see a description of such usage. I
> also searched man bash with [0-9]+:[0-9]+. But I still don't find a
> description. Could anybody let me know where this is documented?
In substring expansion:
If parameter is @, the result is length posi-
tional parameters beginning at offset. If parameter is an
indexed array name subscripted by @ or *, the result is the
length members of the array beginning with ${parameter[offset]}.
--
``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/