javascript - 需要一种有效的方法来对 javascript 中的对象数组进行分组

Question

有没有办法通过引用数组中对象的特定值来对对象数组进行分组

假设我有一个名为

的数组

a=[
{name: "abc", address: "xxx"}
{name: "def", address: "yyy"}
{name: "xyz", address: "xyz"}
{name: "abc", address1: "123"}
{name: "def", address1: "456"}
]

我需要将同名地址添加到一个对象中，新数组应如下所示

b =[
{name:"abc", address: "xxx", address1: "123"}
{name:"def", address: "yyy", address1: "456"}
{name: "xyz", address: "xyz"}
]

Answer 1

您可以使用函数 reduce 按名称分组，并使用函数 Object.values 提取分组的对象。

let a = [{name: "abc", address: "xxx"},{name: "def", address: "yyy"},{name: "xyz", address: "xyz"},{name: "abc", address1: "123"},{name: "def", address1: "456"}],
    result = Object.values(a.reduce((a, {name, ...rest}) => {
      a[name] = Object.assign(a[name] || {name}, rest);
      return a;
    }, Object.create(null)));

console.log(result);

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