aggregateBy<T>

Applies the specified AggregateDescriptors to the data. Returns an AggregateResult instance.

ts

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 }
// }

Parameters

data

T[]

The data on which the calculation will be executed.

descriptors

AggregateDescriptor[]

The aggregate operations that will be executed.

transformers

(reduce: Combinator) => Transformer

For internal use.

Returns

AggregateResult

- The aggregated result.