Unix script - String Validation

Question

I'm very new to Unix scripting (.ksh). I have to implement a functionality to check whether my argument says "welcome" present in an string array e.g.

{"welcome","test","exit"}

The logic is similar to String.contains in Java.

Any help will be appreciated.

Answer 1

You can do something like this. Following is in bash, you need to change it accordingly to ksh.

script

array=(welcome test exit)
string='welcome';
for item in ${array[*]}
do
    if [[ $string =~ .*$item.* ]]
    then
        echo "It's present!"
    fi
done

Output

It's present!

To iterate over arguments passed to a shell script, use for with empty in, that default the iteration over arguments, or in '$@'.