Transforming a Sorted Array into a Wave-like Pattern | Creating a Waveform from a Sorted Array

 The wave sort algorithm is a way to sort an array in a specific pattern, known as a wave form. The basic idea is to sort the array in ascending order and then swap the elements in pairs starting from the second element.

The example implementation in javascript uses one function called waveSort(arr).

• First, the array is sorted in ascending order using the sort() method with a callback function that compares the elements.
• Next, a for loop iterates through the array starting from the second element (index 1) and going in steps of 2 (i+=2).
• Within the loop, the elements at the current index (i) and the previous index (i-1) are swapped using a temporary variable.

Finally, the modified array is returned.

For example, if you have an array [3, 6, 5, 10, 7, 20], the sort() method will return [3, 5, 6, 7, 10, 20] and then the for loop will swap the elements in pairs starting from the second element, resulting in the output [6, 3, 10, 5, 20, 7].

You can test the function by passing an array to it and check the output by console.log

let arr = [3, 6, 5, 10, 7, 20];
console.log(waveSort(arr)); // Output: [6, 3, 10, 5, 20, 7]

Please note that the wave sort assumes that the array has an even number of elements. If the array has an odd number of elements, the last element will be left unchanged. You can add a check for odd-length arrays and handle it accordingly.

To sort an array in wave form in JavaScript, you can first sort the array in ascending order, then swap the elements in pairs starting from the second element. Here is an example implementation:

function waveSort(arr) {
  arr.sort((a, b) => a - b); // sort the array in ascending order
  for (let i = 1; i < arr.length; i += 2) {
    // swap the elements in pairs starting from the second element
    let temp = arr[i];
    arr[i] = arr[i - 1];
    arr[i - 1] = temp;
  }
  return arr;
}

For example, if you have an array [3, 6, 5, 10, 7, 20], the function will return [6, 3, 10, 5, 20, 7].

You can test the function with the following example:

let arr = [3, 6, 5, 10, 7, 20];
console.log(waveSort(arr)); // Output: [6, 3, 10, 5, 20, 7]

Please note that the wave sort assumes that the array has an even number of elements. If the array has an odd number of elements, the last element will be left unchanged. You can add a check for odd-length arrays and handle it accordingly.