Reverse String in Scala

Welcome to the Reverse String in Scala page! Here, you'll find the source code for this program as well as a description of how the program works.

Current Solution

object ReverseString {
  // revese using recursive & pattern matching
  def reverseString(str: String): String = str.length match {
    case 0 => ""
    case 1 => str
    case _ => reverseString(tail(str)) ++ head(str)
  }

  def head(str: String): String = str.length match {
    case 0 => ""
    case _ => str.slice(0, 1)
  }

  def tail(str: String): String = str.length match {
    case 0 => ""
    case 1 => ""
    case _ => str.slice(1, str.length)
  }

  def main(args: Array[String]) {
    val inputStr: Option[String] = args.length match {
      case 0 => None
      case _ => Some(args(0))
    }
    inputStr.map(reverseString).map(println)
  }
}

Reverse String in Scala was written by:

• rzuckerm
• Vee Ng
• Viet Thang Nguyen

If you see anything you'd like to change or update, please consider contributing.

How to Implement the Solution

No 'How to Implement the Solution' section available. Please consider contributing.

How to Run the Solution

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