logic-helper/test.js

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function sortStringArray(arr) {
  // Sort the array in alphabetical order
  arr.sort();
  // Loop through the array and compare adjacent elements
  for (let i = 0; i < arr.length - 1; i++) {
    // If the adjacent elements are the same, swap them
    if (arr[i] === arr[i + 1]) {
      [arr[i], arr[i + 1]] = [arr[i + 1], arr[i]];
      // Decrement i to recheck the swapped element
      i--;
    }
  }
  return arr;
}
console.log(sortStringArray(1,5,1,2,3,6,5,1))