arrays - 如何检查变量是否为数组？

Question

我有一个变量名循环，我需要检查变量的内容是否为数组:

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

我该怎么做？

Answer 1

要避免调用 grep，您可以使用:

if [[ "$(declare -p variable_name)" =~ "declare -a" ]]; then
    echo array
else
    echo no array
fi