Question

How to shift elements of an array to the right by one position in Scala

Answer 1

import scala.collection.mutable.ArrayBuffer

object ShiftRightApp {
  def main(args: Array[String]): Unit = {
    val numbers = ArrayBuffer(0, 1, 2, 3, 4, 5, 6)

    shiftRight(numbers)
    printArray(numbers)
  }

  def shiftRight(arr: ArrayBuffer[Int]): Unit = {
    if (arr.isEmpty) return

    val last = arr.last
    for (i <- arr.length - 1 to 1 by -1) {
      arr(i) = arr(i - 1)
    }
    arr(0) = last
  }

  def printArray(arr: ArrayBuffer[Int]): Unit = {
    println(arr.mkString(" "))
  }
}



 
/*
run:

6 0 1 2 3 4 5

*/

 

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