功能介绍：如何利用js语法把数组根据相同key转换成嵌套数组格式，下面给大家简单介绍一下具体实现代码！​

基础数组：

const dataList = [
  {
      name: "小米",
      school: "清北本科"
  },
  {
      name: "小米",
      school: "浙大研究生"
  },
  {
      name: "小华",
      school: "上海大学"
  },
  {
      name: "小龙",
      school: "西南大学"
  },
];

具体语法：

let dataArr = [];
dataList.map(mapItem => {
  if (dataArr.length == 0) {
      dataArr.push({ name: mapItem.name, List: [mapItem] })
  } else {
     let res = dataArr.some(item=> {
      if (item.name == mapItem.name) {
        item.List.push(mapItem)
        return true
      }
    })
    if (!res) {
      dataArr.push({ name: mapItem.name, List: [mapItem] })
    }
  }
})

输出结果：

console.log('dataArr', dataArr)
[
    {
        "name": "小米",
        "List": [
            {
                "name": "小米",
                "school": "清北本科"
            },
            {
                "name": "小米",
                "school": "浙大研究生"
            }
        ]
    },
    {
        "name": "小华",
        "List": [
            {
                "name": "小华",
                "school": "上海大学"
            }
        ]
    },
    {
        "name": "小龙",
        "List": [
            {
                "name": "小龙",
                "school": "西南大学"
            }
        ]
    }
]