Bonuses.js

// --------------------------------------------------------Description---------------------------------------------------------------------------------

// John wants to give a total bonus of $851 to his three employees taking fairly as possible into account their number of days of absence during the period under consideration. Employee A was absent 18 days, B 15 days, and C 12 days.
// The more absences, the lower the bonus ...
// How much should each employee receive? John thinks A should receive $230, B $276, C $345 since 230 * 18 = 276 * 15 = 345 * 12 and 230 + 276 + 345 = 851.

// Task:
// Given an array arr (numbers of days of absence for each employee) and a number s (total bonus) the function bonus(arr, s) will follow John's way and return an array of the fair bonuses of all employees in the same order as their numbers of days of absences.
// s and all elements of arr are positive integers.

// Examples:
// bonus([18, 15, 12], 851) -> [230, 276, 345]
// bonus([30, 27, 8, 14, 7], 34067) -> [2772, 3080, 10395, 5940, 11880]

// Notes
// See Example Test Cases for more examples.
// Please ask before translating.
// In some tests the number of elements of arr can be big.

// ----------------------------------------------------------------------------------------------------------------------------------------------------

const bonus = (arr, s) => {
  // Find the minimum value in the input array
  let min = Math.min(...arr);
  // Map each element in the array to a ratio of min divided by the element
  let x = arr.map((el) => min / el);
  // Calculate the sum of the ratios
  let sumOfX = x.reduce((acc, currentValue) => acc + currentValue);
  // Map each ratio to a proportional share of the sum s, rounded to the nearest integer
  return x.map((el) => Math.round((el * s) / sumOfX));
};

// Test cases to validate the bonus function
const testCases = [
  // Each test case includes an array, a sum, and the expected result
  { arr: [18, 15, 12], s: 851, expected: [230, 276, 345] },
  {
    arr: [30, 27, 8, 14, 7],
    s: 34067,
    expected: [2772, 3080, 10395, 5940, 11880],
  },
  { arr: [1, 2, 3], s: 6, expected: [3, 2, 1] }, // Example test case
];

// Loop through each test case
testCases.forEach(({ arr, s, expected }, index) => {
  // Calculate the result using the bonus function
  const result = bonus(arr, s);
  // Log the result for the test case
  console.log(`Test Case ${index + 1}: `, result);
  // Assert that the result matches the expected value
  console.assert(
    JSON.stringify(result) === JSON.stringify(expected),
    `Expected ${JSON.stringify(expected)}, but got ${JSON.stringify(result)}`
  );
});