Calculate the Square Root of Sum of Squares of Each numbers in a given file - using UDF which use Option..Some..None

Calculate the Square Root of Sum of Squares of Each numbers in a given file - using UDF which use Option..Some..None

// Excluded all characters from each line and find the square root of sum of squares of each numbers

$ cat charsAndNumbers.txt
1,a,b,c,2,3,4
2,3,4,x,y,z
s,t,u,5,2
m,n,8,10
5,2,1,a,x,y
7,a,x,2,6,h


scala> val r1 = sc.textFile("/home/hadoop/Desktop/vow/charsAndNumbers.txt")

// user defined function to extract only integers and exclude all characters
 def toInt(s:String):Option[Int] ={
   try{
Some(s.toInt)
   }
   catch {
case e: Exception => None
   }
       }
     

val r2 = r1.map(x => {
                       val fields = x.split(",")
   var s = 0
   for(f <- fields)
{
val currentNumber =  toInt(f).getOrElse(0) // calling UDF
if (currentNumber != 0){
s = s + (currentNumber * currentNumber)
}
}

s
                   })


scala> r2.collect
res1: Array[Int] = Array(30, 29, 29, 164, 30, 89)


scala> val result = r2.reduce(_+_)
result: Int = 371


scala> val finalResult = scala.math.sqrt(result)
finalResult: Double = 19.261360284258224

scala> scala.math.sqrt( (1*1) + (2*2) + (3*3) + (4*4)
     |  + (2*2) + (3*3) + (4*4)
     |  + (5*5) + (2*2)
     |  + (8*8) + (10*10)
     |  + (5*5) + (2*2) + (1*1)
     |  + (7*7) + (2*2) + (6*6))
res8: Double = 19.261360284258224