Scala Programming: Remove the duplicate elements of a given array and return the new length of the array

Last update on June 12 2025 12:55:41 (UTC/GMT +8 hours)

Write a Scala program to remove the duplicate elements of a given sorted array and return the new length of the array.

Sample array: [20, 20, 30, 40, 50, 50, 50, 50, 60, 60]
After removing the duplicate elements the program should return 5 as the new length of the array

Sample Solution:

Scala Code:

object Scala_Array {
  def test(nums: Array[Int]) : Int = {
    var index = 1;
        for (i <- 0 to nums.length-1) {
            if (nums(i) != nums(index))
           {
               index += 1
               nums(index) = nums(i)
              }
        }
	  index;
  }  
  
  def main(args: Array[String]): Unit = {
    val nums = Array(20, 20, 30, 40, 50, 50, 50, 50, 60, 60);  
	  println(s"Original array length: ${nums.length}");
		println("Array elements are: ");
      for (i <- 0 to nums.length - 1) 
        {
             print(s"${nums(i)} ");
        }
		println(s"\nThe new length of the array after removing the duplicate elements is: ${test(nums)}");
      }
  }

Sample Output:

Original array length: 10
Array elements are: 
20 20 30 40 50 50 50 50 60 60 
The new length of the array after removing the duplicate elements is: 5

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Scala Code Editor :

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