Javascript将数组过滤到新数组中

Question

所以我有这些数据:

const data = [
  {  
    product_name: 'BMW',
    year: '1982'
  },
  {
    product_name: 'BMW',
    year: '1998'
  },
  {
    product_name: 'LandRover',
    year: '1982'
  },
  {
    product_name: 'BMW',
    year: '1982'
  },
  {
    product_name: 'LandRover',
    year: '1985'
  },
  {
    product_name: 'LandRover',
    year: '1981'
  }
]

使用普通的 javascript，我需要将数据过滤到这样的数组中:

[
  {
    name: 'BMW',
    data: [1982, 1998, 1982]
  },
  {
    name: 'LandRover',
    data: [1982, 1985, 1981]
  }
]

有人可以帮忙吗？不确定解决这个问题的最佳方法。

非常感谢

Answer 1

您可以reduce将数据发送到Map ，得到Map values iterator ，然后 spread它到一个数组:

const data = [{"product_name":"BMW","year":"1982"},{"product_name":"BMW","year":"1998"},{"product_name":"LandRover","year":"1982"},{"product_name":"BMW","year":"1982"},{"product_name":"LandRover","year":"1985"},{"product_name":"LandRover","year":"1981"}];

const result = [...data.reduce((m, o) => {
  // if map doesn't have the product_name, init the object and add to map
  m.has(o.product_name) || m.set(o.product_name, {
    name: o.product_name,
    data: []
  });

  // get the product object, and add the year
  m.get(o.product_name).data.push(o.year);

  return m;
}, new Map()).values()]; // get the map values, and spread to an array

console.log(result);