如图：
变成：
js原生如下:
var abc=[
{typeid:1,ade:1},
{typeid:2,ade:1},
{typeid:1,ade:2},
{typeid:1,ade:2},
{typeid:2,ade:2},
] var result={}; for(i=0;i<abc.length;i++){
if(result[abc[i].typeid]){
result[abc[i].typeid]+=abc[i].ade;
}else{
result[abc[i].typeid]=abc[i].ade;
}
}
console.log(result) var keyvalue=[];
for(var key in result){
keyvalue.push({typeid:key,adelenth:result[key]})
}
console.log(keyvalue)
es6如下：
var arry= [ {key:'a',value:2}, {key:'a',value:2}, {key:'a',value:2}, {key:'b',value:8} ]
let result = {}; array.forEach(item => { if(result[item.key]){ result[item.key] += item.value; }else{ result[item.key] = item.value; } })
let s = []; for(let k in result){ s.push({key:k,value:result[k]}); }