传入数组
let arr = [
{ year: 2021 },
{ year: 2020 },
{ year: 2020 },
{ year: 2019 },
{ year: 2021 }]
let arrList = this.sort_pro(arr, ['year'])
console.log(arrList)
结果
调用方法
sort_pro(data, keys = []) {
//keys可以传一个数组
var c = []
var d = {}
for (var element of data) {
let element_keyStr = ''
let element_key = []
let element_keyObj = {}
for (var key of keys) {
element_key.push(element[key])
element_keyObj[key] = element[key]
}
element_keyStr = element_key.join('_')
if (!d[element_keyStr]) {
c.push({
...element_keyObj,
children: [element]
})
d[element_keyStr] = element
} else {
for (var ele of c) {
let isTrue = keys.some(key => {
return ele[key] != element[key]
})
if (!isTrue) {
ele.children.push(element)
}
}
}
}
return c
},
