如何从arrayList中提取对象并将其添加到另一个arrayList中

Question

我正在尝试通过修改内部对象之一将一个数组列表转换为另一个数组列表

   let array1 = [
            {
              name: "test",
              address: "testaddress",
              state: {
                2022: {
                  January: { month_state: "pending" },
                },
              },
            },
            {
              name: "test2",
              address: "testaddress2",
              state: {
                2022: {
                  January: { month_state: "pending" },
                },
              },
            },
          ];

，我想转换成这个，这是正确的方法吗？谢谢。

let array2 = [
            {
              name: "test",
              address: "testaddress",
              2022: {
                January: { month_state: "pending" },
              },
            },

            {
              name: "test2",
              address: "testaddress2",
              2022: {
                January: { month_state: "pending" },
              },
            },
          ];

Answer 1

let array2 = array1.map(({ state, ...rest }) => ({ ...rest, ...state }))

这段代码就可以了。

Answer 2

有多种方法可以实现您的要求。

我将向您展示使用 .map 的函数方法。

let array1 = [
    {
        name: "test",
        address: "testaddress",
        state: {
            2022: {
                January: { month_state: "pending" }
            }
        }
    },
    {
        name: "test2",
        address: "testaddress2",
        state: {
            2022: {
                January: { month_state: "pending" }
            }
        }
    }
];

let array2 = array1.map((el) => {
    const tmp = {
        name: el.name,
        adress: el.adress
    };
    
    // Here we iterate el.state, so we can extract each year.
    /* We need to dynamically generate a property name (each year). 
So we use a feature called "computed property names (ES2015)" */
    for (const prop in el.state) {
        tmp[prop] = el.state[prop];
    }

    return tmp;
});
console.log(array2);

您还可以使用 for 循环，这也是一种有效的方法。