Question

I have a loop over variable names and I need to check if content of a variable is an array or not:

for varname in AA BB CC; do
  local val
  if [ "$varname" is array ]; then # how can I perform this test?
    echo do something with an array
  else
    echo do something with a "'normal'" variable
  fi
done

How do I do it?

Answer 1

According to this wiki page, you can use this command:

declare -p variable-name 2> /dev/null | grep -q '^declare \-a'