js中一个对象中遇到一个相同的key所对应的value值相加

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){
    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]}); }

 

转载于:https://www.cnblogs.com/weiyf/p/9066236.html