Function reduce

reduce<T, U>(
reduction: (result: U, value: T, index: number) => U,
initial: U,
): (values: Iterable<T>) => U
Creates a reducer function that applies a specified reduction function to an iterable.
Type Parameters
- T
  Element type
- U
  Result type
Parameters
- reduction: (result: U, value: T, index: number) => U
  Function that combines the accumulated result with each element
- initial: U
  Initial value for the reduction
Returns (values: Iterable<T>) => U
A function that reduces an iterable to a single value
Example
```
G.pipe(
  G.range(1, 5),
  G.reduce((sum, n) => sum + n, 0)
) // 15
```
- Defined in generator/src/reduce.ts:19