题解 | #无重复数组#

const _getUniqueNums = (start,end,n) => {
                // 补全代码
                let arr = [];
                while(n){
                    let item = Math.ceil(Math.random()*(end-start)+start)
                    if(!arr.includes(item)){
                        arr.push(item);
                        n--;
                    }
                }
                return arr
            }