题解 | #无重复数组#

 const _getUniqueNums = (start,end,n) => {
                // 补全代码
                let arr=[];             
                //1-10
                for(let i=0;i<n;i++){
                     let num= Math.floor(Math.random()*(end-start+1)+start);
                    if(arr.indexOf(num)==-1){
                        arr.push(num);
                    }
                }
                return arr;
                
            }