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About Kotlin

Kotlin is a cross-platform, statically typed, general-purpose programming language with type inference.

About Scala

Scala is a general-purpose programming language providing support for functional programming and a strong static type system.

Palindrome Check Example: Kotlin vs Scala

Palindrome Check in Kotlin

fun isPalindrome(str: String): Boolean {
    val clean = str.lowercase().filter { it.isLetterOrDigit() }
    return clean == clean.reversed()
}

fun main() {
    println(isPalindrome("A man, a plan, a canal: Panama")) // true
    println(isPalindrome("race a car")) // false
}

Palindrome Check in Scala

object PalindromeChecker {
  def isPalindrome(str: String): Boolean = {
    val clean = str.toLowerCase.filter(_.isLetterOrDigit)
    clean == clean.reverse
  }

  def main(args: Array[String]): Unit = {
    println(isPalindrome("A man, a plan, a canal: Panama")) // true
    println(isPalindrome("race a car")) // false
  }
}

Bubble Sort Example: Kotlin vs Scala

Bubble Sort in Kotlin

fun bubbleSort(arr: IntArray) {
    val n = arr.size
    for (i in 0 until n) {
        for (j in 0 until n - i - 1) {
            if (arr[j] > arr[j + 1]) {
                val temp = arr[j]
                arr[j] = arr[j + 1]
                arr[j + 1] = temp
            }
        }
    }
}

fun main() {
    val arr = intArrayOf(64, 34, 25, 12, 22, 11, 90)
    bubbleSort(arr)
    println(arr.joinToString(" "))
}

Bubble Sort in Scala

object BubbleSort {
  def bubbleSort(arr: Array[Int]): Array[Int] = {
    val n = arr.length
    for (i <- 0 until n; j <- 0 until n - i - 1) {
      if (arr(j) > arr(j + 1)) {
        val temp = arr(j)
        arr(j) = arr(j + 1)
        arr(j + 1) = temp
      }
    }
    arr
  }

  def main(args: Array[String]): Unit = {
    val arr = Array(64, 34, 25, 12, 22, 11, 90)
    println(bubbleSort(arr).mkString(" "))
  }
}