#scan

Like reduce but returns an array of all intermediate accumulator values.

The result array starts with the initial value and ends with the final accumulator, so its length is array.length + 1.

scan([1, 2, 3, 4], (acc, n) => acc + n, 0)
// [0, 1, 3, 6, 10]

#Usage

#scan<T, R>(array: readonly T[], fn: (accumulator: R, value: T, index: number) => R, initial: R)

Like reduce but returns an array of all intermediate accumulator values.

The result array starts with the initial value and ends with the final accumulator, so its length is array.length + 1.

import { scan } from 'massaman'
// or:  import { scan } from 'massaman/array'

scan([1, 2, 3, 4], (acc, n) => acc + n, 0)
// [0, 1, 3, 6, 10]

#Parameters

#Returns

an array containing the initial value followed by every intermediate accumulator.

R[]