循环判断多个变量的值是否为空的疑惑

ox_one

user="test"
pwd="110"

list=('$user' '$pwd')
# echo "list = '${list[*]}'"

for i in "${list[@]}"
do
    # echo "i = $i"
    if [ "$i" = "" ] ; then
        echo "$i is ok"
    else
        echo "$i is no"
    fi
done

为什么判断的结果不正确？

ox_one

user="test"
pwd="110"

list=('$user' '$pwd')
echo "list = '${list[*]}'"

for i in "${list[@]}"
do
    # echo "i = $i"
    if [ "${!i}" = "" ] ; then
        echo "$i is ok"
    else
        echo "$i is no"
    fi
done

好像这样可以了 …… 汗