Function reduce

reduce<T>(iterable: Iterable<T>, f: (z: T, x: T, i: number) => T): undefined | T
Folds over each element of the iterable with a reducer function.

The initial value for the fold is the first element of the iterable.

A right fold can be performed by calling reversed on the iterable first.
Type Parameters
- T
  type of the item
Parameters
- iterable: Iterable<T>
  the iterable
- f: (z: T, x: T, i: number) => T
  the step function, which takes the accumulator and item
Returns undefined | T
Throws
if the iterable is empty
- Defined in src/reduce.ts:16
reduce<T, U>(iterable: Iterable<T>, f: (z: U, x: T, i: number) => U, z: U): U
Folds over each element of the iterable with a reducer function.

A right fold can be performed by calling reversed on the iterable first.
Type Parameters
- T
  type of the item
- U
Parameters
- iterable: Iterable<T>
  the iterable
- f: (z: U, x: T, i: number) => U
  the step function, which takes the accumulator and item
- z: U
  the starting accumulator
Returns U
- Defined in src/reduce.ts:32