如何聚合对象数组并对其进行验证JavaScript？

Question

我有一个包含许多对象的数组，我想在某些验证中将两个数组聚合到一个对象中，比如如果相同的键在两个对象中都有值，那么如果一个键只有值，则输出对象的键值应该为空在单个中，则值应出现在输出对象中和示例：

let userValues = [
                {
                    "userId": "810",
                    "values": {
                        "21866": "Russia",
                        "21867": "Dog",
                        "21868": ""
                    },
                },
                {
                    "userId": "811",
                    "values": {
                        "21866": "UAE",
                        "21867": "",
                        "21868": "cheddar cheese"
                    },
                }
            ]
let aggricagtedValue= {
              "21866": "",
              "21867": "Dog",
              "21868": "cheddar cheese"
          }

Answer 1

这种方式可以帮助到你：

const data = [
  {
    "userId": "810",
    "values": {
      "21866": "Russia",
      "21867": "Dog",
      "21868": ""
    },
  },
  {
    "userId": "811",
    "values": {
      "21866": "UAE",
      "21867": "",
      "21868": "cheddar cheese"
    },
  }
];

console.log(Object.values(data.reduce((acc, {values}) => {
  Object.keys(values).forEach((key) => {
    if (!acc[key]) acc[key] = {key, values: []};
    if (values[key].length > 0) acc[key].values.push(values[key]);
  });
  return acc;
}, {})).reduce((acc, {key, values}) => {
  const _values = values.filter(item => item.length > 0).filter((value, index, self) => self.indexOf(value) === index);
  acc[key] = _values.length === 1 ? _values[0] : '';
  return acc;
}, {}));

Answer 2

function collectGroupedValues(result, { values }, idx, arr) {
  // main aggregation task ...
  result = Object
    .entries(values)
    .reduce((obj, [key, value]) => {
      // ... which straightforwardly pushes items into an array.
      if (key in obj) {
        obj[key].push(value);
      } else {
        obj[key] = [value];
      }
      return obj;
    }, result);

  // finalizing aggregation task ...
  if (idx >= arr.length - 1) {
    result = Object.fromEntries(Object
      .entries(result)
      .map(([key, valueList]) => {
        // ... which sanitizes each array ...
        valueList = valueList
          .filter(value =>
            // (filter empty strings from array)
            value.trim() !== ''
          );
        // ... an on top of the sanitized
        // result does create the final entry.
        return [
          key,
          (valueList.length === 1) ? valueList[0] : '',
        ];
      })
    );
  }
  return result
}
let userValues = [{
  "userId": "810",
  "values": {
    "21866": "Russia",
    "21867": "Dog",
    "21868": "",
  },
}, {
  "userId": "811",
  "values": {
    "21866": "UAE",
    "21867": "",
    "21868": "cheddar cheese",
  },
}];

console.log({ userValues });
console.log(userValues.reduce(collectGroupedValues, {}));

userValues.push({
  "userId": "812",
  "values": {
    "21866": "France",
    "21867": "Goat",
    "21868": "fromage",
  }
});

console.log({ userValues });
console.log(userValues.reduce(collectGroupedValues, {}));

.as-console-wrapper { min-height: 100%!important; top: 0; }

如何聚合对象数组并对其进行验证JavaScript？

how to aggregate and do validation on array of object JavaScript?

javascript

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