Type Alias Lambda<Args, R>

Lambda: (...args: Args) => R

A function value, equivalent to Excel's LAMBDA — the type of a lambda-consuming parameter (BYROW's fn) and of the value LAMBDA itself returns.

The first type argument is the parameter list as a tuple, the second is the return type:

Lambda<[accumulator: Scalar, value: Scalar], Scalar> — a REDUCE/SCAN accumulator.
Lambda<[row: IRange], Scalar> — BYROW's one-parameter lambda.
Lambda<[rowIndex: number, colIndex: number], Scalar> — MAKEARRAY's builder.
Lambda<Scalar[], Scalar> — variadic, when the arity is decided per call (MAP).

Type Parameters

Args extends readonly any[] = Scalar[]
The parameter tuple. Defaults to variadic scalars.
R = Scalar
The return type. Defaults to Scalar.

Type Declaration

- (...args: Args): R
- Parameters
  - ...args: Args
  Returns R