问使用reduce将JavaScript中集合对象的属性值相加

EN

var bar = [
  { a: 10, b: 20 }, { a: 10, b: 20 }
];

var reduce = bar.reduce((acc, item) => {
  acc['a'] = item.a++;
  acc['b'] = item.b++
  return acc;
}, {});

 console.log(reduce);
 {a: 10, b: 20}