reduceArray

Import

import { reduceArray } from 'ngxtension/reduce-array';

Usage

Basic

Apply a reduce function to an array emitted by an Observable.

import { of } from 'rxjs';
import { reduceArray } from 'ngxtension/reduce-array';

const source$ = of([1, 2, 3]);
const reduced$ = source$.pipe(reduceArray((acc, e) => acc + e, 0));

Examples

Example 1: Sum Array Elements

const source$ = of([1, 2, 3]);
const reduced$ = source$.pipe(reduceArray((acc, e) => acc + e, 0));
// Output: 6

API

Inputs

• reduceFn: (accumulator: R, item: T, index: number) => R - A function to reduce each element of the array, similar to JavaScript’s .reduce() method.
• initialValue: R - The initial value for the accumulator.