建议给定嵌套循环的优化代码

    @for i in $(LIST_A); do \\
            for j in  $(LIST_B); do\\
            if [ \"$$i\" = \"$$j\" ] ;then\\
             echo \" A match found \";\\                
            else\\
            echo \"Not found any corresponding String in LIST_B \";\\
                     fi; \\
            done\\
    done;

#!/bin/ksh

LIST_A=\"a b c d e\"
LIST_B=\"d f g\"

got_match=\"0\"

for item_A in $LIST_A
do
    #echo $item_A
    for item_B in $LIST_B
    do
        #echo $item_A \"  \" $item_B
        if [ \"$item_A\" == \"$item_B\" ]
        then
            echo \"matched \" $item_A
            got_match=\"1\"
            break 2;
        fi
    done
done

if [ \"$got_match\" == \"0\" ]
then
    echo \"no match\"
fi