[SOLVED] Storing a variable in one for loop to be used in next loop bash

Issue

I want to write a script which will take the output of a job submission script as a variable to be used for the same next for loop. I have written it as follows

temp= (40 50)
for  i in "${!temp[@]}"; do
  cd ${temp[i]}-$((temp[i]+10))ns;
  ((counter++))
  var="ID$((counter-1))"
  var1=ID$counter
  if [[ "$i" -eq 0]]; then
    var1=$(qsub jobsubmission.sh);
  else
    var1=$(qsub -W depend=afterok:${var} jobsubmission.sh);
  fi
  cd ..;
done

The script goes into a directory, submits a job then goes into the next directory and submits a job based on dependancy of the job created in the first loop. The problem in this script is that the variable "var" is not taking the value of variable assigned in the before loop. Please suggest a way.

Solution

In trying to simplify your script for troubleshooting, I identified the two "!" are extraneous, preventing the array values from being derived.

Also, it is not advisable to reuse the same variable for looping in multiple loops within the same code.

Lastly, to pass position-dependant values to the second loop for, again, position-dependant usage, you need to assign those values to another array.

The distilled logic flow and diagnostic coding is this:

#!/bin/bash

#lastVal=""
altVal=()
temp=( 50 60 )
action()
{
    #for  i in  "${!temp[@]}"
    for  i in  "${temp[@]}"
    do
        echo "i = ${i}"
        #lastVal="ABC_${i}"
        altVal[$i]="ABC_${i}"
        #mkdir ${temp[i]}-$((temp[i]+10))ns
        #cd ${temp[i]}-$((temp[i]+10))ns
        #lastVal=$(qsub jobsubmission.sh)
        #cd ..
    done
}

#action lastVal
action
echo ""

temp=( 60 70)
#for  j in  "${!temp[@]}" 
for  j in  "${temp[@]}" 
do
    echo "j = ${j}"
    previous=$( expr ${j} - 10 )
    echo "${altVal[ ${previous} ]}"
    echo ""
    #mkdir ${temp[j]}-$((temp[j]+10))ns
    #cd ${temp[j]}-$((temp[j]+10))ns
    #var1=$(qsub -W  depend=afterok:${lastVal} jobsubmission.sh)
    #cd ..
done

and the session log is this:

ericthered@OasisMega1:/WORKS$ ./test_41.sh
i = 50
i = 60

j = 60
ABC_50

j = 70
ABC_60

ericthered@OasisMega1:/WORKS$

Answered By - Eric Marceau

Answer Checked By - Senaida (WPSolving Volunteer)