On Thu, Jul 16, 2020 at 03:52:01PM +0200, Thomas Schmitt wrote:
> I tried
>
> echo " 34 + 45 \| abc \| 1 2 3 \| c\|123abc " | \
> sed -e 's/\\|/\n/g' | \
> mapfile -t _S_AR
>
> with no visible effect on the array _S_AR. bash 4.3.30 and 5.0.11.
You can't use a pipeline, because each command in the pipeline runs in
a separate subshell.
> This works
>
> echo " 34 + 45 \| abc \| 1 2 3 \| c\|123abc " | sed -e 's/\\|/\n/g' >/tmp/x
>
> mapfile -t _S_AR < /tmp/x
Yes. Temp files are fine.
> A workaround without temporary file would be
>
> x=" 34 + 45 \| abc \| 1 2 3 \| c\|123abc "
> split=$(echo "$x" | sed -e 's/\\|/\n/g')
> end=$(echo -n "$x" | sed -e 's/./+/g')"+"
>
> mapfile -t _S_AR <<$end
> $split
> $end
No... just use the process substitution that I showed you already.
mapfile -t myarray < <(some command)
Do you need an actual demonstration?
unicorn:~$ f() { printf '%s\n' ' one ' 'two' 't h r e e'; }
unicorn:~$ mapfile -t a < <(f)
unicorn:~$ declare -p a
declare -a a=([0]=" one " [1]="two" [2]="t h r e e")
