整理对象数组中相同的键，并求和javascript的值

function sumValues(arr) {
  let result = {};
  
  arr.forEach(obj => {
    for (let key in obj) {
      if (obj.hasOwnProperty(key)) {
        if (result.hasOwnProperty(key)) {
          result[key] += obj[key];
        } else {
          result[key] = obj[key];
        }
      }
    }
  });
  
  return result;
}

const arr = [
  { name: 'A', value: 10 },
  { name: 'B', value: 20 },
  { name: 'A', value: 30 },
  { name: 'C', value: 40 }
];

{
  name: 'A',
  value: 40,
  B: 20,
  C: 40
}