Function getLast

javascript/0763-partition-labels.js:40–49

(S, lastSeen = [])

};

const getLast = (S, lastSeen = []) => {
    for (const index in S) {
        /* Time O(N) */
        const code = getCode(S[Number(index)]);

        lastSeen[code] = Number(index); /* Space O(1) */
    }

    return lastSeen;
};

const getCode = (char) => char.charCodeAt(0) - 'a'.charCodeAt(0);