Question

How to find the first non-repeated character in a string with Scala

Answer 1

object FirstNonRepeatedCharacter {
  def getFirstNonRepeatedCharacter(str: String): Option[Char] = {
    str.toCharArray.find(ch => str.indexOf(ch) == str.lastIndexOf(ch))
  }

  def main(args: Array[String]): Unit = {
    val s = "scala programming"
    
    val ch = getFirstNonRepeatedCharacter(s)
    
    println(ch.getOrElse("No non-repeated character"))
  }
}

 
 
/*
run:
   
s
 
*/

 

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