#reduceWhile

Like reduce but stops early when the predicate returns false.

The predicate receives the current accumulator and element. When it returns false, the current accumulator is returned without processing the remaining elements.

// Sum until we hit a negative number
reduceWhile(
  [1, 2, 3, -1, 5],
  (acc, n) => n >= 0,
  (acc, n) => acc + n,
  0,
)
// 6

#Usage

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

Like reduce but stops early when the predicate returns false.

The predicate receives the current accumulator and element. When it returns false, the current accumulator is returned without processing the remaining elements.

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

// Sum until we hit a negative number
reduceWhile(
  [1, 2, 3, -1, 5],
  (acc, n) => n >= 0,
  (acc, n) => acc + n,
  0,
)
// 6

#Parameters

#Returns

the accumulated value when the input ends or the predicate first returns false.

R