Set variables in parallel in bash

Question

Here\'s an example program:

#!/bin/bash

for x in {1..5}
do
  output[$x]=$(echo $x) &
done

wait

for x in {1..5}
do
  echo ${output[$x]}
done
         


        

Answer 1

If you want to avoid writing files, you can use GNU parallel:

#!/bin/bash
output=(`parallel -k --gnu echo {1} ::: {1..5}`)
for i in ${output[@]}
do
   echo $i
done

The -k is to preserve the order of the output