I have an array of grouped objects, but I'm unable to iterate through and achieve the desired result.
[ 000000010: [
{
"userId" : "000000010",
"played" : 10,
"lost" : 5,
"date" :"2019-04-01T00:00:00.000Z"
},
{
"userId" : "000000010",
"played": 15,
"lost" : 0,
"date" :"2019-04-02T00:00:00.000Z"
},
],
000000020: [
{
"userId" : "000000020",
"played": 11,
"lost" : 4,
"date" :"2019-04-01T00:00:00.000Z"
},
{
"userId" : "000000020",
"played": 15,
"lost" : 0,
"date" :"2019-04-02T00:00:00.000Z"
},
]
]
I want to eliminate all possible duplicates and group all similar objects as follows
{
"userId" : "000000010",
"played": 30,
"lost" : 5,
},
{
"userId" : "000000020",
"played": 26,
"lost" : 6,
},
I have tried
Object.entries()
but it returned
[obeject: object]
I have also tried
const allResults = {}
Object.keys(result).forEach(function(key) {
let chats = result[key].chats;
allResults[chats] = allResults[chats] ? allResults[chats] + 1 : 1;
});
But I get undefined
If you are looking to sum the played
and lost
fields you should use reduce
to merge the objects, summing the required fields. Then convert the array of entries back into an object.
Try this
const inputData = {
"000000010":[
{
"userId":"000000010",
"played":10,
"lost":5,
"date":"2019-04-01T00:00:00.000Z"
},
{
"userId":"000000010",
"played":15,
"lost":0,
"date":"2019-04-02T00:00:00.000Z"
}
],
"000000020":[
{
"userId":"000000020",
"played":11,
"lost":4,
"date":"2019-04-01T00:00:00.000Z"
},
{
"userId":"000000020",
"played":15,
"lost":0,
"date":"2019-04-02T00:00:00.000Z"
}
]
};
const result = Object.entries(inputData).map(([key, values]) => {
const merged = values.reduce((accum, x) => {
accum.played += x.played;
accum.lost += x.lost;
return accum;
}, {"userId": key, "played": 0, "lost": 0});
return [key, merged];
});
console.log(Object.fromEntries(result));
Node prints the following
{
'000000010': { userId: '000000010', played: 25, lost: 5 },
'000000020': { userId: '000000020', played: 26, lost: 4 }
}