I have a data like this
const dataSet = [
{
'Transactions.productRef': 'SomeRef/123',
'Transactions.itemCount': 25,
'Transactions.revenue': 1000,
},
{
'Transactions.productRef': 'SomeRef/124',
'Transactions.itemCount': 35,
'Transactions.revenue': 500,
},
];
and I'm trying to assign an object with properties to the value of the 'Transactions.productRef' to have something like this
{
'SomeRef/123': {
productRef: 'SomeRef/123',
soldTickets: 25,
revenue: 1000,
},
'SomeRef/124': {
productRef: 'SomeRef/124',
soldTickets: 35,
revenue: 500,
}
}
and then to create a new array with objects. I have tried something like this
const dataSet = [ { 'Transactions.productRef': 'SomeRef/123', 'Transactions.itemCount': 25, 'Transactions.revenue': 1000, }, { 'Transactions.productRef': 'SomeRef/124', 'Transactions.itemCount': 35, 'Transactions.revenue': 500, }, ]; const productMap = {}; dataSet.reduce((data, p) => { p[data['Transactions.productRef']] = p[data['Transactions.productRef']] || {}; p[data['Transactions.productRef']].soldTickets = data['Transactions.itemCount']; p[data['Transactions.productRef']].revenue = data['Transactions.revenue']; p[data['Transactions.productRef']].productRef = data['Transactions.productRef']; return p; }, productMap); const newData = Object.values(productMap); console.log(newData);
but the console.log
returns an empty array like the data was never assigned to the productMap
object. What am I doing wrong? Thanks in advance!
Swap p
and data
in the reduce
callback inputs like below.
Because first param is the previousValue
and second param is the currentValue
.
dataSet.reduce((p, data) => {
p[data['Transactions.productRef']] = p[data['Transactions.productRef']]
|| {};
p[data['Transactions.productRef']].soldTickets =
data['Transactions.itemCount'];
p[data['Transactions.productRef']].revenue =
data['Transactions.revenue'];
p[data['Transactions.productRef']].productRef =
data['Transactions.productRef'];
return p;
}, productMap);
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