JavaScript数组处理--合并相同key的data值

 /***对象数组合并相同key的data
	* 参数：1.待操作数组
	2.参考key
	3.待合并key */

 mergeKeyArr(arr, key1, key2) {
     arr = this.sortArr(arr, true, 1, key1)
     let newArr = []
     let tempValue = 0 // 临时存储数据
     let curName = arr[0][key1]
     // 合并相同curName的数据
     arr.forEach((item, index) => {
         if (item[key1] === curName) {
             tempValue += item[key2]
         } else {
             let obj = {
                 ...arr[index - 1]
             }
             obj[key2] = tempValue
             newArr.push(obj)
             curName = item[key1]
             tempValue = item[key2]
         }
     })
     let obj = {
         ...arr[arr.length - 1]
     }
     obj[key2] = tempValue
     newArr.push(obj)
     return newArr
 }