题解 | #查找重复元素#
查找重复元素
http://www.nowcoder.com/practice/871a468deecf453589ea261835d6b78b
function duplicates(arr) {
const tmp = [];
arr.sort((a,b)=>a-b)
for(let i = 0 ; i<arr.length;i++){
if(arr[i] == arr[i+1]){
tmp.push(arr[i])
}
}
let tmp1 = [...new Set(tmp)]
return tmp1
}