编辑代码

function slice(arr) {
  let newObj = {};
  for (let i = 0; i < arr.length; i++) {
    for (let j = i; j < arr.length; j++) {
      const key = `${i}:${j}`;
      newObj[key] = arr.slice(i, j);
    }
  }
  return newObj;
}

const arr = slice([1, 2, 3, 4, 5, 6]);
console.log(arr["1:5"]);