标签:qml gem span function object number func 方式 ram
问题
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}]
目标
let badgeMerge = [{id: 323, badge: 20},{id: 311, badge: 4},{id: 352, badge: 103},{id: 480, badge: 5}]
第一种方式
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)
}
})
第二种方式
Object.values(badge.reduce((t,c)=>{
(!t[c.id] && (t[c.id]= c)) || (t[c.id] && (t[c.id].badge += c.badge));
return t;
}, {}));
标签:qml gem span function object number func 方式 ram
原文地址:https://www.cnblogs.com/objectjj/p/14661499.html