Function delimitWord

javascript/0271-encode-and-decode-strings.js:40–53

(str, index)

};

const delimitWord = (str, index) => {
    const delimiter = str.indexOf('#', index); /* Time O(K) */
    const length = Number(str.slice(index, delimiter)); /* Time O(K) */
    const [start, end] = [delimiter + 1, delimiter + length + 1];
    const word = str.slice(
        start,
        end,
    ); /* Time O(K) | Ignore Auxillary Space O(K) */

    return {
        nextIndex: end,
        word,
    };
};

/**
 * Non-ASCII Delimiter - Ignore Auxiliary Space