Applies the specified AggregateDescriptors to the data. Returns an AggregateResult instance.
const data = [
{ unitPrice: 23, unitsInStock: 21 },
{ unitPrice: 10, unitsInStock: 12 },
{ unitPrice: 20, unitsInStock: 33 }
];
const result = aggregateBy(data, [
{ aggregate: "sum", field: "unitPrice" },
{ aggregate: "sum", field: "unitsInStock" }
]);
//output:
// {
// "unitPrice": { "sum": 53 },
// "unitsInStock": { "sum": 66 }
// }
T[]
The data on which the calculation will be executed.
The aggregate operations that will be executed.
(reduce: Combinator) => Transformer
For internal use.
- The aggregated result.