locutus/esm/python/functools/reduce.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

import { noInitializer, pythonReduce } from "../_helpers/_functools.js";
export function reduce(func, iterable, initializer) {
    //      discuss at: https://locutus.io/python/functools/reduce/
    // parity verified: Python 3.12
    //     original by: Kevin van Zonneveld (https://kvz.io)
    //          note 1: Reduces Python iterables to one plain value using a caller-provided combining function.
    //       example 1: reduce((a, b) => a + b, [1, 2, 3, 4])
    //       returns 1: 10
    //       example 2: reduce((a, b) => a + b, 'abc')
    //       returns 2: 'abc'
    return arguments.length >= 3 ? pythonReduce(func, iterable, initializer) : pythonReduce(func, iterable, noInitializer);
}