Summary of “Arrays”. Part 2

Sorting an array.

var numbers = [12, 3, 7, 9, 10, 5];

for (var i = 0; i <= numbers.length - 2; i++) {
  var minValue = numbers[i];

  for (var j = i + 1; j <= numbers.length - 1; j++) {
    if (numbers[j] < minValue) {
      minValue = numbers[j];
      var swap = numbers[i];
      numbers[i] = minValue;
      numbers[j] = swap;
    }
  }
}

// Logs [3, 5, 7, 9, 10, 12];
console.log(numbers);

An array with numbers numbers is sorted by ascending elements. At each iteration, we compare minValue with the rest of the array elements. If any of them is less than minValue, it will be written to minValue, overwriting the old value, and moved to the beginning of the array. Variable swap is an auxiliary variable that we can use to swap elements.