JAVASCRIPT

sum of digits with reduce function

import functools
from functools import reduce


def sum_of_digits(number):
    return functools.reduce(add, to_list(number))


def add(x, y):
    return x + y


def to_list(num):
    return list(map(int, str(num)))

javascript reduce sum

let nums = [1, 2, 3];

nums.reduce((curr, next) => curr + next);

javascript reduce sum

arrSum = function(arr){  return arr.reduce(function(a,b){    return a + b  }, 0);}