let badge = [{id: 323, badge: 10},{id: 323, badge: 10},{id: 311, badge: 1},{id: 311, badge: 1},{id: 311, badge: 1},{id: 311, badge: 1},{id: 352, badge: 3},{id: 352, badge: 100},{id: 480, badge: 5}]
// 根据id合并叠加计算输出
let badgeMerge = [{id: 323, badge: 20},{id: 311, badge: 4},{id: 352, badge: 103},{id: 480, badge: 5}]首先获取所有id，在根据这个分组在组内进行badege值计算
let keys = Array.from(new Set(badge.map(item => item.id)))
var badgeMerge = keys.map(key => {
return {
id: key,
badge: badge.filter(item => item.id == key).reduce((pre, cur) => pre+cur.badge, 0)
}
})