javascript - 如何获取对象数组中键的总和并删除连续对象的重复项？

Question

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Answer 1

const arr = [
  { description: "Senior", amount: 50 },
  { description: "Senior", amount: 50 },
  { description: "Adult", amount: 75 },
  { description: "Adult", amount: 35 },
  { description: "Infant", amount: 25 },
];

const result = Object.values(
  arr.reduce((acc, item) => {
    acc[item.description] = acc[item.description]
      ? { ...item, amount: item.amount + acc[item.description].amount }
      : item;
    return acc;
  }, {})
);

console.log(result);