sum-of-two-lowest-positive-integers.js

function sumTwoSmallestNumbers(numbers) {
  // find the two smallest numbers

  // a place to store the smallest number
  let smallest;
  // a place to store the 2nd smallest number
  let secondSmallest;

  // compare the first two numbers in the array
  if (numbers[0] < numbers[1]) {
    smallest = numbers[0]
    secondSmallest = numbers[1]
  } else {
    smallest = numbers[1]
    secondSmallest = numbers[0]
  }

  // iterate over numbers starting with the 3rd number
  for (let i = 2; i < numbers.length; i++) {
    const currentNumber = numbers[i];
    // if the current number is smaller than the smallest number
    if (currentNumber < smallest) {
      // set smallest number to be the 2nd smallest number
      secondSmallest = smallest;
      // set the current number to be the smallest number
      smallest = currentNumber;
    } else if (currentNumber < secondSmallest) {
      // else if the current number is smaller than the 2nd smallest number
      // set the 2nd smallest number to the current number
      secondSmallest = currentNumber;
    }
  }

  console.log(smallest, secondSmallest);

  // return the sum of the 2 smallest numbers
  return smallest + secondSmallest;
}

function sumTwoSmallestNumbers(numbers) {
  const smallest = Math.min.apply(null, numbers);
  const smallestIndex = numbers.indexOf(smallest);
  const numbersWithoutSmallest = numbers.slice();
  numbersWithoutSmallest.splice(smallestIndex, 1);
  const secondSmallest = Math.min.apply(null, numbersWithoutSmallest);
  return smallest + secondSmallest;
}

function sumTwoSmallestNumbers(numbers) {
  const smallest = Math.min(...numbers);
  const smallestIndex = numbers.indexOf(smallest);
  const numbersWithoutSmallest = numbers.slice();
  numbersWithoutSmallest.splice(smallestIndex, 1);
  const secondSmallest = Math.min(...numbersWithoutSmallest);
  return smallest + secondSmallest;
}

console.log(sumTwoSmallestNumbers([5, 8, 12, 19, 22]), 13, "Sum should be 13");
console.log(sumTwoSmallestNumbers([15, 28, 4, 2, 43]), 6, "Sum should be 6");
console.log(sumTwoSmallestNumbers([3, 87, 45, 12, 7]), 10, "Sum should be 10");
console.log(sumTwoSmallestNumbers([23, 71, 33, 82, 1]), 24, "Sum should be 24");
console.log(sumTwoSmallestNumbers([52, 76, 14, 12, 4]), 16, "Sum should be 16");