对js对象进行分组

Question

我刚刚学习，无法对对象进行分组

我需要按“产品”字段对对象进行分组，并按“keyResults”和“指标”字段中的“产品”字段进行过滤

我知道这是使用reduce函数完成的，但我不能，我也尝试过使用Lodash sortby函数，但这不是我需要的

请帮忙:(

const a = {
  products: {
    keyResults: [
      {
        leader: "Aaron",
        product: "Product 1"
      },
      {
        leader: "Addie",
        product: "Product 1"
      },
      {
        leader: "Mindy",
        product: "Product 1"
      },
      {
        leader: "Wiley",
        product: "Product 2"
      },
    ],
    metrics: [
      {
        leader: "Aaron",
        product: "Product 1"
      },
      {
        leader: "Wiley",
        product: "Product 2"
      }
    ]
  }
};

这就是我所期望的

const b = {
  products: [
    {
      product: "Product 1",
      keyResults: [
        {
          leader: "Aaron",
          product: "Product 1"
        },
        {
          leader: "Addie",
          product: "Product 1"
        },
        {
          leader: "Mindy",
          product: "Product 1"
        }
      ],
      metrics: [
        {
          leader: "Aaron",
          product: "Product 1"
        },
      ]
    },
    {
      product: "Product 2",
      keyResults: [
        {
          leader: "Wiley",
          product: "Product 2"
        },
      ],
      metrics: [
        {
          leader: "Wiley",
          product: "Product 2"
        }
      ]
    }
  ]
};

Answer 1

将产品收集到一个对象中，并将属性作为产品名称，并使用

Object.values()

 将产品作为数组获取：

const products = {};

for(const key in a.products){
  for(const product of a.products[key]){
    ((products[product.product] ??= {product: product.product})[key] ??= []).push(product);
  }
}

const b = {products: Object.values(products)};

console.log(b);

<script>
const a = {
  products: {
    keyResults: [
      {
        leader: "Aaron",
        product: "Product 1"
      },
      {
        leader: "Addie",
        product: "Product 1"
      },
      {
        leader: "Mindy",
        product: "Product 1"
      },
      {
        leader: "Wiley",
        product: "Product 2"
      },
    ],
    metrics: [
      {
        leader: "Aaron",
        product: "Product 1"
      },
      {
        leader: "Wiley",
        product: "Product 2"
      }
    ]
  }
};
</script>