let res={};
arr.forEach(item=>{
item.sort((a,b)=>a-b);
res[item]=item;
});
console.log(Object.values(res));
return Object.values(res)
let res={};
arr.forEach(item=>{
item.sort((a,b)=>a-b);
res[item]=item;
});
console.log(Object.values(res));
return Object.values(res)