palindrome

Simple palindrome example using scala

1) reading the input in a variable 

scala> val s="sasas"

s: String = sasas

2)spliting and comparing the string first and last as per palindrome rule. 

scala> (for (x <- 0 to s.length/2) yield (s(x) == s(s.length - x - 1)))

res2: scala.collection.immutable.IndexedSeq[Boolean] = Vector(true, true, true)

3)see whether it is true or false using Boolean member.

scala> .reduceLeft((a,b)=> a && b)

res3: Boolean = true

Use the same as a function

def isPalindrome(s: String) = {

       (for (x <- 0 to s.length/2) yield (s(x) == s(s.length - x - 1)))

       .reduceLeft((a,b)=> a && b)

   }