Re: Bash forgets array values outside of a while loop

[Paul Jarc]

Joe User <bergeron@vallnet.com> wrote:
>               ( for i in 0 1 2 3 4 ; do echo $i ; done ) |
>                       while read f[$fnum]; do echo "${f[@]}"; 
> fnum=$(($fnum+1)); done

See FAQ entry E4.  Each element of a pipeline is run in its own
process.  (Thus your subshell for the first element is also
redundant.)

>        Almost like f has scope within the while loop.

The scope is the pipeline element.  This will show the value set in
the loop:
... | { while read blah; do foo; done; echo $blah; }


paul