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Re: IFS is ignored when concatenating array elements

From: Chet Ramey
Subject: Re: IFS is ignored when concatenating array elements
Date: Sat, 14 Mar 2015 18:16:19 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.5.0

On 3/13/15 6:15 PM, isabella parakiss wrote:
> This works as I would expect:
> $ arr=(a b c); IFS=+; echo "${arr[*]/a/x}"
> x+b+c
> But for some reason, this ignores IFS:
> $ arr=(a b c); IFS=+; arr=${arr[*]/a/x}; echo "$arr"
> x b c

Because it doesn't occur within a double-quoted string.  Posix recently
(within the last few weeks) released an interpretation that extends the
double-quoted behavior of the expansion of `*' to all contexts where word
splitting does not take place:


I haven't done anything to change the bash behavior yet.


``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/

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