js把一个数组根据相同名字合并成到子数组里

let arr = [
 {date: '2022-06-06', name:'张三', age: '18'},
 {date: '2022-06-06', name:'李四', age: '25'},
 {date: '2022-06-07', name:'王五', age: '34'},
 {date: '2022-06-07', name:'张三', age: '18'},
 {date: '2022-06-07', name:'小明', age: '38'},
 {date: '2022-06-08', name:'王五', age: '34'},
 {date: '2022-06-09', name:'小白', age: '24'}
]

//方法
let dataArr = [];
arr.map(items => {
  if (dataArr.length == 0) {
	  dataArr.push({ name: items.name, list: [items] })
  } else {
	 let res = dataArr.some(item=> {//判断相同名字，有就添加到当前项
	  if (item.name == items.name) {
		item.list.push(items)
		return true
	  }
	})
	if (!res) {//如果没找相同名字添加一个新对象
	  dataArr.push({ name: items.name, list: [items] })
	}
  }
})

console.log('输出结果', dataArr)

//输出结果
//0: {name: '张三', List: Array(2)}
//1: {name: '李四', List: Array(1)}
//2: {name: '王五', List: Array(2)}
//3: {name: '小明', List: Array(1)}
//4: {name: '小白', List: Array(1)}