合并复杂的多维数组

Question

在Javascript中，我创建了一个多维数组，但出于另一个目的，我需要对其进行转换。

所以我的数组是这样的

array [

  0 => {

    "ulStatic": [

      0 => {

        "day": "2019-03-30 18:30:00"

        "id": "7"

        "origin": "intentions"

      }

    ]

    "ulDynamic": [

      0 => {

        "day": "2019-03-30 18:30:00"

        "id": "275"

        "origin": "obs"

      }

    ]

    "ulCreatedDynamic": []

  }

  1 => {

    "ulStatic": [

      0 => {

        "day": "2019-03-31 09:30:00"

        "id": "8"

        "origin": "intentions"

      }

    ]

    "ulDynamic": []

    "ulCreatedDynamic": []

  }

  2 => {

    "ulStatic": []

    "ulDynamic": []

    "ulCreatedDynamic": [

      0 => {

        "day": "2019-04-03 19:30:00"

        "id": "277"

        "origin": "obs"

      }

    ]

  }

]

我正在尝试使用此数组：

array [

  0 => {

    "day": "2019-03-30 18:30:00"

    "elements": [

      0 => {

        "id": "7"

        "origin": "intentions"

      }

      1 => {

        "id": "275"

        "origin": "obs"

      }

    ]

  }

  1 => {

    "day": "2019-03-31 09:30:00"

    "elements": [

      0 => {

        "id": "8"

        "origin": "intentions"

      }

    ]

  }

  2 => {

    "day": "2019-04-03 19:30:00"

    "elements": [

      0 => {

        "id": "277"

        "origin": "obs"

      }

    ]

  }

]

我必须承认，我不知道从哪里开始。我在寻找map（），splice（），concat（），但这对我来说很混乱。您能帮我提出一些建议以实现这一目标吗？

Answer 1

day用reduce和对输入进行分组，并返回对象值。const inputAry = [{    "ulStatic": [{      "day": "2019-03-30 18:30:00",      "id": "7",      "origin": "intentions"    }],    "ulDynamic": [{      "day": "2019-03-30 18:30:00",      "id": "275",      "origin": "obs"    }],    "ulCreatedDynamic": []  },  {    "ulStatic": [{      "day": "2019-03-31 09:30:00",      "id": "8",      "origin": "intentions",    }],    "ulDynamic": [],    "ulCreatedDynamic": []  },  {    "ulStatic": [],    "ulDynamic": [],    "ulCreatedDynamic": [{      "day": "2019-04-03 19:30:00",      "id": "277",      "origin": "obs"    }]  }];const groupByDay = inputAry.reduce((group, statics) => {  // flattens the statics array  [].concat.apply([], Object.values(statics))    .forEach(({      day,      id,      origin    }) => {      // creates a dictionary entry with day as key, if already exist use the existing one or creates a new entry      group[day] = group[day] || {        day,        elements: []      };      // push the id and origin to elements      group[day].elements.push({        id,        origin      });    });  return group;}, {});const expectedResult = Object.values(groupByDay);console.log(expectedResult);