Question

How to find the most repeated character in a string with Scala

Answer 1

object MostRepeatedChar_Scala {
  def main(args: Array[String]): Unit = {
    val str = "scalarustc++javascriptcphpc#";
    
    val mostRepeatedChar = str
      .groupBy(identity)
      .mapValues(_.length)
      .maxBy(_._2)
      ._1

    println(s"The most repeated character is: '$mostRepeatedChar'")
  }
}

 
 
 
/*
run:
   
The most repeated character is: 'c'
 
*/

 

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Answer 2

import scala.collection.mutable.Map

def getMostRepeatedChar(str: String): Char = {
  val charCounts = Map[Char, Int]()
  var maxCount = 0
  var maxChar = ' '

  for (char <- str) {
    val count = charCounts.getOrElse(char, 0) + 1
    charCounts(char) = count

    if (count > maxCount) {
      maxCount = count
      maxChar = char
    }
  }

  maxChar
}

val str = "scalarustc++javascriptcphpc#";

val mostRepeatedChar = getMostRepeatedChar(str)

println(s"The most repeated character is: '$mostRepeatedChar'")

 
 
 
/*
run:
   
The most repeated character is: 'c'
 
*/

 

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