lodash中有多个分组

const users = [
  { name: 'Alice', age: 20 },
  { name: 'Bob', age: 25 },
  { name: 'Charlie', age: 20 }
];

const groupedByAge = _.groupBy(users, 'age');
console.log(groupedByAge);
// 输出：{ '20': [ { name: 'Alice', age: 20 }, { name: 'Charlie', age: 20 } ], '25': [ { name: 'Bob', age: 25 } ] }

const numbers = [1, 2, 3, 4, 5, 6];

const [evenNumbers, oddNumbers] = _.partition(numbers, num => num % 2 === 0);
console.log(evenNumbers);
// 输出：[2, 4, 6]
console.log(oddNumbers);
// 输出：[1, 3, 5]

const users = [
  { id: 1, name: 'Alice' },
  { id: 2, name: 'Bob' },
  { id: 3, name: 'Charlie' }
];

const usersById = _.keyBy(users, 'id');
console.log(usersById);
// 输出：{ '1': { id: 1, name: 'Alice' }, '2': { id: 2, name: 'Bob' }, '3': { id: 3, name: 'Charlie' } }