将对象数组转换为具有相似字段值的数组对象

function convertArrayToObjectArray(arr, field) {
  const uniqueValues = [...new Set(arr.map(obj => obj[field]))];
  const result = [];

  uniqueValues.forEach(value => {
    const newObj = { [field]: value, objects: [] };
    arr.forEach(obj => {
      if (obj[field] === value) {
        newObj.objects.push(obj);
      }
    });
    result.push(newObj);
  });

  return result;
}

// 示例用法
const students = [
  { name: 'Alice', age: 18 },
  { name: 'Bob', age: 20 },
  { name: 'Charlie', age: 18 },
  { name: 'Dave', age: 20 }
];

const result = convertArrayToObjectArray(students, 'age');
console.log(result);

[
  { age: 18, objects: [ { name: 'Alice', age: 18 }, { name: 'Charlie', age: 18 } ] },
  { age: 20, objects: [ { name: 'Bob', age: 20 }, { name: 'Dave', age: 20 } ] }
]