最长连续字符

题目描述

note

设计一个函数，输入一个字符串，返回该字符串中最长的连续字符，及其个数。 例如：输入'abcaadefkkkgh'返回 {k: 3}

function findMostLetter(string) {
    if (typeof string !== 'string' || string === null) {
        return null;
    }
    let currentStr = string[0];
    let currentCount = 1;
    let maxCount = currentCount;
    let maxLetter = currentStr;
    for (let i = 1; i < string.length; i++) {
        if (string[i] === currentStr) {
            currentCount += 1;
        } else {
            currentStr = string[i];
            currentCount = 1;
        }
        if (currentCount > maxCount) {
            maxCount = currentCount
            maxLetter = string[i]
        }
    }
    let result = {}
    result[maxLetter] = maxCount
    return result;
}