Lodash按多个关键点分组

const _ = require('lodash');

const data = [
  { name: 'Alice', age: 25, gender: 'female' },
  { name: 'Bob', age: 30, gender: 'male' },
  { name: 'Charlie', age: 25, gender: 'male' },
  { name: 'Diana', age: 30, gender: 'female' },
];

const groupedData = _.groupBy(data, (item) => {
  return `${item.age}-${item.gender}`;
});

console.log(groupedData);

{
  '25-female': [ { name: 'Alice', age: 25, gender: 'female' } ],
  '30-male': [ { name: 'Bob', age: 30, gender: 'male' } ],
  '25-male': [ { name: 'Charlie', age: 25, gender: 'male' } ],
  '30-female': [ { name: 'Diana', age: 30, gender: 'female' } ]
}