如何使用唯一键合并对象数组？

Question

我有以下数组 objects.i 想要将这些对象与月份合并为唯一 ID。

[
  { month: 7, openSlot: 9, confirmed: 0, requested: 0, total: 0 },
  { month: 5, openSlot: 0, confirmed: 6, requested: 0, total: 0 },
  { month: 7, openSlot: 0, confirmed: 0, requested: 0, total: 17 }
]

上面的数组应该这样合并


  { month: 7, openSlot: 9, confirmed: 0, requested: 0, total: 17 },
 { month: 5, openSlot: 0, confirmed: 6, requested: 0, total: 0 }

Answer 1

您可以将 month 与对象分开，并通过它们的键添加所有其他值。

const
    data = [{ month: 7, openSlot: 9, confirmed: 0, requested: 0, total: 0 }, { month: 5, openSlot: 0, confirmed: 6, requested: 0, total: 0 }, { month: 7, openSlot: 0, confirmed: 0, requested: 0, total: 17 }],
    result = Object.values(data.reduce((r, { month, ...o }) => {
        r[month] ??= { month };
        Object
            .entries(o)
            .forEach(([k, v]) => r[month][k] = (r[month][k] || 0) + v);
        return r;
    }, {}));

console.log(result);

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Answer 2

您可以使用 forEach 并添加每个键的值来完成此操作。注意：如果您对更优化的代码感兴趣，请使用

的解决方案

const data = [
  { month: 7, openSlot: 9, confirmed: 0, requested: 0, total: 0 },
  { month: 5, openSlot: 0, confirmed: 6, requested: 0, total: 0 },
  { month: 7, openSlot: 0, confirmed: 0, requested: 0, total: 17 }
]

function merge(data) {

  let tempObj = {};

  data.forEach(item => {

    if (tempObj[item['month']]) {
      let temp = {}
      Object.entries(item).forEach(([key, value]) => {

        temp[key] = key === 'month' ? value : value + tempObj[item['month']][key];

      })
      tempObj[item['month']] = temp

    } else {
      tempObj[item['month']] = item
    }

  });

  return tempObj;
}

console.log(Object.values(merge(data)));

如何使用唯一键合并对象数组？

How can i merge an array of objects with with a unique key?

javascript

data-structures

typescript