hashmap.sh

declare -A -r my_hashmap=(
  ["foo"]="bar"
  ["baz"]="qux"
)

echo "${my_hashmap["foo"]}"

for key in "${!my_hashmap[@]}"; do
    echo "key: $key, val: ${my_hashmap[$key]}"
done

# key: foo, val: bar
# key: baz, val: qux