Shell Script for Reddit Daily Programmer - #198 Easy

wwe.sh

#!/usr/local/bin/zsh

#Get the left word.
echo -n "Enter the left word: "
read leftWord
echo -n "Enter the right word: "
read rightWord

#Get the length of each.
llen=${#leftWord}

#Make a counter. Start at 1 since zsh indexes there.
counter=1

#Loop through and compare the characters.
while [[ $counter -le $llen ]]; do
        letter=$leftWord[$counter]

        #Find the index of the current character of the left word in the right word.
        index=$(echo "$rightWord" | sed -n "s/[$letter].*//p" | wc -c | tr -d ' ')

        if [[ $index -gt 0 ]]; then
                leftWord=$(echo "$leftWord" | sed "s/$letter//")
                rightWord=$(echo "$rightWord" | sed "s/$letter//")

                #Reassess the length.
                llen=${#leftWord}
        else
                #Only increment the counter if there were no changes in size.
                counter=$(expr $counter + 1)
        fi
done

#Write the final results.
echo "Results: <$leftWord> - <$rightWord>"

#Compare the two and determine the winner.
if [[ ${#leftWord} -gt ${#rightWord} ]]; then
        echo "Left wins: ${#leftWord} to ${#rightWord}"
elif [[ ${#leftWord} -lt ${#rightWord} ]]; then
        echo "Right wins: ${#leftWord} to ${#rightWord}"
else
        echo "Tie: ${#leftWord} to ${#rightWord}"
fi