如何删除数组中的重复对象，并使用JavaScript计算重复出现的次数？

let obj = {};
let result = [];

for (let i = 0; i < array.length; i++) {
  let item = array[i];
  obj[item] = obj[item] ? obj[item] + 1 : 1;
}

for (let key in obj) {
  let newObj = {};
  newObj[key] = obj[key];
  result.push(newObj);
}

function removeDuplicatesAndCount(array) {
  let obj = {};
  let result = [];

  for (let i = 0; i < array.length; i++) {
    let item = array[i];
    obj[item] = obj[item] ? obj[item] + 1 : 1;
  }

  for (let key in obj) {
    let newObj = {};
    newObj[key] = obj[key];
    result.push(newObj);
  }

  return result;
}

let array = [1, 2, 3, 2, 1, 3, 4, 5, 4, 6];
let uniqueObjects = removeDuplicatesAndCount(array);
console.log(uniqueObjects);

[
  { '1': 2 },
  { '2': 2 },
  { '3': 2 },
  { '4': 2 },
  { '5': 1 },
  { '6': 1 }
]