最长连续序列

const longestConsecutive = (nums = [0,1,2,4,8,5,6,7,9,3,55,88,77,99,999999999]) => {
    const length = nums.length
    if(length === 0 || length === 1) return length
    nums = nums.sort((x, y) => x - y)
    let len = 1
    let startIdx = 1
    for(let i = 1; i < nums.length; i++){
        const pre = nums[i - 1]
        const cur = nums[i]
        if(pre === cur){
            continue
           
        }else if(cur - pre === 1){
            startIdx++
            if(startIdx > len){
                len = startIdx
            }
        }else{
            startIdx = 1
        }
    }
    return len
};

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