Unix shell脚本如何测试所有数组值是否等于特定值？

Question

I Have three array variables like var[1]=1 var[2]=1 var[3]=1 Now i want to check all these three array variables is equal to 1 or not using if command.

I tried something like

if [[ ${var[@] == 1 ]]; then
echo "Yes"
else
echo "No"
fi

The result of the above code should be Yes but i'm getting No as an answer.

Can anyone please help me on this?

Answer 1

${var[@]} will expand to 1 1 1 which is most definitely not equal to 1 .

You can use something like:

rc=Yes
for val in ${var[@]} ; do
    if [[ ${val} != 1 ]]; then
        rc=No
    fi
done
echo $rc

or the more succinct:

rc=Yes
for v in ${var[@]}; do [[ $v == 1 ]] || rc=No; done
echo $rc