sorting_numbers.js

const assert = require("assert");

function sortingNumbers(list = []) {
  assert(list);
  let currentActiveNumber = Number.MIN_SAFE_INTEGER;

  return list.reduce((accumulator, current) => {
    if (currentActiveNumber < current) {
      accumulator.push(current);
      currentActiveNumber = current;
    }

    return accumulator;
  }, []);
}

const firstTesting = sortingNumbers([
  9, 44, 32, 12, 7, 45, 31, 98, 35, 41, 8, 20, 27, 32, 83, 64, 61, 28, 39, 93,
  29, 92, 17,
]);
const firstRespose = [9, 44, 45, 98];

const secondTesting = sortingNumbers([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
const secondResponse = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];

const thirdTesting = sortingNumbers([]);
const thirdResponse = [];

const fourtyTesting = sortingNumbers([9, 9, 9, 9, 9, 9, 9, 9]);
const fourtyResponse = [9];

assert(firstTesting, firstRespose);
assert(secondTesting, secondResponse);
assert(thirdTesting, thirdResponse);
assert(fourtyTesting, fourtyResponse);