Contents

case class PalindromeProducts(minFactor: Int, maxFactor: Int) {

  lazy val (smallest: (Int, Set[(Int, Int)]),
            largest: (Int, Set[(Int, Int)])) = {
    val palindromes = for (a <- Range(minFactor, maxFactor + 1);
         b <- Range(a, maxFactor + 1) if isPalindrome(a * b)) yield (a * b, (a, b))
    val mapped = palindromes.groupBy(_._1).map{case(k, v) => (k, v.map(_._2).toSet)}
    (mapped.minBy(_._1), mapped.maxBy(_._1))
  }

  private def isPalindrome(i: Int) = i.toString == i.toString.reverse
}

Version data entries

254 entries across 254 versions & 1 rubygems

Version	Path
trackler-2.2.1.36	tracks/scala/exercises/palindrome-products/example.scala
trackler-2.2.1.35	tracks/scala/exercises/palindrome-products/example.scala
trackler-2.2.1.34	tracks/scala/exercises/palindrome-products/example.scala
trackler-2.2.1.33	tracks/scala/exercises/palindrome-products/example.scala
trackler-2.2.1.32	tracks/scala/exercises/palindrome-products/example.scala
trackler-2.2.1.31	tracks/scala/exercises/palindrome-products/example.scala
trackler-2.2.1.30	tracks/scala/exercises/palindrome-products/example.scala
trackler-2.2.1.29	tracks/scala/exercises/palindrome-products/example.scala
trackler-2.2.1.28	tracks/scala/exercises/palindrome-products/example.scala
trackler-2.2.1.27	tracks/scala/exercises/palindrome-products/example.scala
trackler-2.2.1.26	tracks/scala/exercises/palindrome-products/example.scala
trackler-2.2.1.25	tracks/scala/exercises/palindrome-products/example.scala
trackler-2.2.1.24	tracks/scala/exercises/palindrome-products/example.scala
trackler-2.2.1.23	tracks/scala/exercises/palindrome-products/example.scala
trackler-2.2.1.22	tracks/scala/exercises/palindrome-products/example.scala
trackler-2.2.1.21	tracks/scala/exercises/palindrome-products/example.scala
trackler-2.2.1.20	tracks/scala/exercises/palindrome-products/example.scala
trackler-2.2.1.19	tracks/scala/exercises/palindrome-products/example.scala
trackler-2.2.1.18	tracks/scala/exercises/palindrome-products/example.scala
trackler-2.2.1.17	tracks/scala/exercises/palindrome-products/example.scala