题解 | #查找重复元素#
查找重复元素
https://www.nowcoder.com/practice/871a468deecf453589ea261835d6b78b
function duplicates(arr) {
let repeatArr = []
for(let i = 0;i<arr.length;i++){
if(arr.indexOf(arr[i]) != arr.lastIndexOf(arr[i]) && !repeatArr.includes(arr[i])){ repeatArr.push(arr[i])
}
}
return repeatArr
}
