let arr= [{id:1,value:2}, {id:2,value:6}, {id:1,value:4}, {id:2,value:1}] is finally converted to
[{id:1,value:6}, {id:2,value:7}]
let arr= [{id:1,value:2}, {id:2,value:6}, {id:1,value:4}, {id:2,value:1}] is finally converted to
[{id:1,value:6}, {id:2,value:7}]
var arr1 = [];
for(var i = 0 ;i < arr.length ; iPP){
var obj = arr[i];
for(var j = i + 1 ; j < arr.length ; jPP){
if(obj.id == arr[j].id){
obj.value += arr[j].value;
arr.splice(j,1);
j--;
}
}
arr1.push(obj);
}let uniq=new Map()
//
for(let i=0;i<arr.length;iPP){
let id=arr[i].id,val=arr[i].value
if(uniq.has(id)) uniq.set(id,uniq.get(id)+val)
else uniq.set(id,val)
}
let res=[]
//
for(let comb of uniq){
res.push({
id:comb[0],
value:comb[1]
})
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