Member of the starry suite—modular functions for iterable objects.

Status

Applies to the whole suite.

Usage

function reduce<T = any>(
  iterable: Iterable<T>, 
  accumulator: (previousValue: T, currentValue: T) => T
  ): T
function reduce<T = any, U = any>(
  iterable: Iterable<T>,
  accumulator: (previousValue: U, currentValue: T) => U,
  initialValue: U
  ): U

Applies an accumulator function over an iterable.

Parameters:

• iterable: Iterable<T>
• accumulator: (previousValue, currentValue) - An accumulator function over the iterable.
  • previousValue - The accumulate or the initial value.
  • current - The current item of the iterable. Must return - The new accumulate.
• initialValue - Optional via argument length. The initial accumulator value.

This works like Array.prototype.reduce.