将公共对象追加到一个数组中并删除重复项

Question

我正在尝试从Javascript数组中删除重复的对象。

我有一个这样的物体

var actualObj = [
  {
    "name": "Sam",
    "id": "1",
    "dept": "Inventory",
    "info": {
      "key1": "test1",
      "key2": "test2",
      "key3": "test3"
    }
  },
  {
    "name": "Paul",
    "id": "2",
    "dept": "Inventory",
    "info": {
      "key1": "test1",
      "key2": "test2",
      "key3": "test3"
    }
  },
  {
    "name": "Sam",
    "id": "1",
    "dept": "Inventory",
    "info": {
      "key4": "test4",
      "key5": "test5",
      "key6": "test6"
    }
  }
]

我试图删除重复项并将“信息”组合到对象数组中，就像这样

var expectedObj = [
  {
    "name": "Sam",
    "id": "1",
    "dept": "Inventory",
    "info": [
      {
        "key1": "test1",
        "key2": "test2",
        "key3": "test3"
      },
      {
        "key4": "test4",
        "key5": "test5",
        "key6": "test6"
      }
    ]
  },
  {
    "name": "Paul",
    "id": "2",
    "dept": "Inventory",
    "info": {
      "key1": "test1",
      "key2": "test2",
      "key3": "test3"
    }
  }
]

在“ info”对象中使用相同的值，我尝试使用Lodash，它可以很好地运行JSFIDDLE

任何人都可以帮助我从实际目标中实现预期目标。 我正在尝试通过组合为具有相似id值的一个对象来创建期望的对象。

Answer 1

您可以尝试一下，希望它对您有用。

for(let i = 0; i < actualObj.length; i++) {
    let o = actualObj[i];
    for(let j = i+1; j < actualObj.length; j++) {
        let b = actualObj[j];
        // dublicate object identified by id
        if (o.id === b.id) {
            const info = [];
            info.push(o.info);
            info.push(b.info);
            o.info = info;
            actualObj.splice(j, 1); 
        }
    }
}

如果您的重复对象是由其他属性（例如name和dept）标识的，则只需更新if条件，例如

if (o.id === b.id && o.name === b.name && o.dept === b.dept)

Answer 2

使用lodash， _.groupBy()的项目由id ，然后_.map()组到所请求的格式，使用_.omit()来获得无信息基本对象，并_.map()得到一个info数组。 使用_.assign()合并为一个对象：

 var actualObj = [{"name":"Sam","id":"1","dept":"Inventory","info":{"key1":"test1","key2":"test2","key3":"test3"}},{"name":"Paul","id":"2","dept":"Inventory","info":{"key1":"test1","key2":"test2","key3":"test3"}},{"name":"Sam","id":"1","dept":"Inventory","info":{"key4":"test4","key5":"test5","key6":"test6"}}]; var result = _(actualObj) .groupBy('id') .map(function(group) { return _.assign(_.omit(group[0], 'info'), { info: _.map(group, 'info') }); }) .value(); console.log(result); 

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