function dr( arr ){ //Duplicate removal
let aNews = arr;
for(let i = 0; i < arr.length; i++){
for(let j = 0; j < arr.length; j++){
if( arr[i] == arr[j] && i!=j){
arr.splice(j,1)
}
}
}
return aNews;
}
function dr( arr ){ //Duplicate removal
let aNews = arr;
for(let i = 0; i < arr.length; i++){
for(let j = 0; j < arr.length; j++){
if( arr[i] == arr[j] && i!=j){
arr.splice(j,1)
}
}
}
return aNews;
}
原文：https://www.cnblogs.com/lgyong/p/8490610.html