Concatenate strings in Bash to call an array in a For loop

Question

I'm looking to nest a couple For loops in bash to first check one array and then based on that array, check a second array.

#!/bin/sh

domArr=( "ABC" "DEF" "GHI" )
ABCarr=( "1" "2" "3" )
DEFarr=( "4" "5" "6" )
GHIarr=( "7" "8" "9" )

for domain in "${domArr[@]}"
do
    # This should be 'domain = "ABC"'
    for group in "${domain+arr[@]}"
    do
        # This should be 'group = "1"'
    done
done

Answer 1

You may use it like this:

domArr=( "ABC" "DEF" "GHI" )
ABCarr=( "1" "2" "3" )
DEFarr=( "4" "5" "6" )
GHIarr=( "7" "8" "9" )

for domain in "${domArr[@]}"
do
    echo "iterating array ${domain}arr ..."
    a="${domain}arr[@]"
    for group in "${!a}"
    do
        echo "$group"
    done
done

Output:

iterating array ABCarr ...
1
2
3
iterating array DEFarr ...
4
5
6
iterating array GHIarr ...
7
8
9