Show how bash associative arrays work.

test-bash-aarrays.sh

#!/usr/local/bin/bash

declare -A aa
aa[foo]=bar
aa[fee]=baz
aa[fie]=tar
for key in "${!aa[@]}" ; do
  printf "key: '%s'    val: '%s'\n" $key "${aa[$key]}"
done
echo "${aa[@]}"
exit

test-bash-arrays.out

$ ./test-bash-aarrays.sh
key: 'fie'    val: 'tar'
key: 'foo'    val: 'bar'
key: 'fee'    val: 'baz'
tar bar baz