如何在 JavaScript 中连接两个具有数组属性的对象？

Question

我有两个对象：

var one = {
  addedItems: [0, 1],
  removedItems: [8, 9],
  oneTwo: false,
  someStuff: {
    anotherArray: ['a', 'b']
  }
};

var two = {
  addedItems: [3, 4],
  removedItems: [6, 7],
  someStuff: {
    anotherArray: ['c', 'd']
  }
};

最后我需要合并这两个对象并得到类似这样的东西：

{
  addedItems: [0, 1, 3, 4],
  removedItems: [8, 9, 6, 7],
  oneTwo: false,
  someStuff: {
    anotherArray: ['a', 'b', 'c', 'd']
  }
}

操作应该在不同结构的对象上执行。

执行此操作的最佳方法（或可能的方法）是什么？ jQuery 或 underscore/lodash 中是否有任何方法允许执行此操作？

Answer 1

您可以生成一个新对象并使用已插入数组中的项目追加数组。

function deepMerge(source, target) {
    Object.keys(source).forEach(function (k) {
        if (Array.isArray(source[k])) {
            if (!Array.isArray(target[k])) {
                target[k] = [];
            }          
            target[k] = target[k].concat(source[k]);
            return;
        }
        if (source[k] && typeof source[k] === 'object') {
            target[k] = target[k] || {};
            deepMerge(source[k], target[k]);
            return;
        }
        target[k] = source[k];
    });
}

var one = { addedItems: [0, 1], removedItems: [8, 9], oneTwo: false, someStuff: { anotherArray: ['a', 'b'] } },
    two = { addedItems: [3, 4], removedItems: [6, 7], someStuff: { anotherArray: ['c', 'd'] } },
    result = {};

deepMerge(one, result);
deepMerge(two, result);

console.log(result);

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

Answer 2

你检查过 Lodash _.mergeWith(object, sources, customizer) 方法了吗？我认为该示例基本符合您的预期。

https://lodash.com/docs/4.17.15#mergeWith

var one = { addedItems: [0, 1], removedItems: [8, 9], oneTwo: false, someStuff: { anotherArray: ['a', 'b'] } },
    two = { addedItems: [3, 4], removedItems: [6, 7], someStuff: { anotherArray: ['c', 'd'] } };

// In case of arrays, concatenate them instead
function customizer(objValue, srcValue) {
  if (_.isArray(objValue)) {
    return objValue.concat(srcValue);
  }
}

var result = _.mergeWith(one, two, customizer);

Here's the working example in Fiddle

如何在 JavaScript 中连接两个具有数组属性的对象？

How to concatenate two object with array properties in JavaScript?

javascript

jquery

underscore.js

lodash