javascript - 通过带有下划线的多个属性对对象数组进行分组

Question

这个问题已经有答案了:

Group by multiple values Underscore.JS but keep the keys and values (3 个回答)

已关闭 6 年前。

我有这样的对象数组。他们有重复的属性(property)contactName和categoryName值(value)观

[
    {
        categoryId:1
        categoryName:"Default"
        contactName:"Anonymous"
        name:"Mobile"
        value:"+4417087654"
    },
    {
        categoryId:1
        categoryName:"Default"
        contactName:"Anonymous"
        name:"Email"
        value:"test2@gmail.com"
    },
    {
        categoryId:1
        categoryName:"Default"
        contactName:"Test"
        name:"Email"
        value:"ivdtest@test.com"
    },
    {
        categoryId:1
        categoryName:"Default"
        contactName:"Test"
        name:"Mobile"
        value:"+4417087654"
    },
    {
        categoryId:2
        categoryName:"Personal"
        contactName:"Anonymous"
        name:"Email"
        value:"ivdtest@test.com"
    },
    {
        categoryId:2
        categoryName:"Personal"
        contactName:"Anonymous"
        name:"Email"
        value:"ivdtest@test.com"
    },
    {
        categoryId:2
        categoryName:"Personal"
        contactName:"Test"
        name:"Email"
        value:"ivdtest@test.com"
    },
    {
        categoryId:2
        categoryName:"Personal"
        contactName:"Test"
        name:"Email"
        value:"ivdtest2@test.com"
    }
]

我想按属性值 contactName 对它们进行分组和categoryName

可能是这样的

[
  {
    "categoryId": 1,
    "categoryName": "Default",
    entity: [
    {
      "contactName": "Anonymous",
      "addresses": [
      {
        "name": "Mobile",
        "value": "+4417087654"
      },
      {
        "name": "Email",
        "value": "test2@gmail.com"
      },
      {
        "name": "Email",
        "value": "ivdtest@test.com"
      }
    ]
    },
    {
      "contactName": "Test",
      "addresses": [
      {
        "name": "Mobile",
        "value": "+4417087654"
      },
      {
        "name": "Email",
        "value": "test2@gmail.com"
      },
      {
        "name": "Email",
        "value": "ivdtest@test.com"
      }
    ]
    }]

  },
  {
    "categoryId": 2,
    "categoryName": "Personal",
    entity: [
    {
      "contactName": "Anonymous",
      "addresses": [
      {
        "name": "Mobile",
        "value": "+4417087654"
      },
      {
        "name": "Email",
        "value": "test2@gmail.com"
      },
      {
        "name": "Email",
        "value": "ivdtest@test.com"
      }
    ]
    },
    {
      "contactName": "Test",
      "addresses": [
      {
        "name": "Mobile",
        "value": "+4417087654"
      },
      {
        "name": "Email",
        "value": "test2@gmail.com"
      },
      {
        "name": "Email",
        "value": "ivdtest@test.com"
      }
    ]
    }]

  }

]

Answer 1

var output = _.groupBy(input, function(entry) { 
  return entry.categoryName + ',' + entry.contactName; 
});

https://jsfiddle.net/9ttg1t3z/