如何组合数组中具有相同属性值的元素

const arr = [
  { id: 1, name: 'A', value: 10 },
  { id: 2, name: 'A', value: 20 },
  { id: 3, name: 'B', value: 30 },
  { id: 4, name: 'B', value: 40 },
  { id: 5, name: 'C', value: 50 }
];

const grouped = arr.reduce((acc, obj) => {
  const { name } = obj;
  if (!acc[name]) {
    acc[name] = [];
  }
  acc[name].push(obj);
  return acc;
}, {});

const combined = Object.entries(grouped).reduce((acc, [name, group]) => {
  const sum = group.reduce((total, obj) => total + obj.value, 0);
  acc.push({ name, sum });
  return acc;
}, []);

console.log(combined);

[
  { name: 'A', sum: 30 },
  { name: 'B', sum: 70 },
  { name: 'C', sum: 50 }
]