String isRotationallySymmetric

object Main extends App {

def isRAsync (str: String): Boolean = {

if (str.length < 2) false

else {

val numbers = Map(

'0' -> '0',

'1' -> '1',

'6' -> '9',

'8' -> '8',

'9' -> '6'

)

var isAsync = true

for (i <- 0 until str.length/2) {

val ch = str.charAt(i)

numbers.isDefinedAt(ch) match {

case true => if (ch != str.charAt(str.length-i-1) && numbers(ch) != str.charAt(str.length-i-1)) isAsync=false

case false => if (ch != str.charAt(str.length-i-1)) isAsync=false

}

}

isAsync

}

}

println(isRAsync("121121"))

}