JavaOne Talk: Groovy Reversible Numbers

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public class GroovyReversible {
  final Integer max
  final Integer numReversible = 0
  public GroovyReversible(max){
    this.max = max
    this.numReversible = this.countReversible()
  }

  def countReversible(){
    numReversible ?: (11..max).findAll{reversible(it)}.size()
  }

  def reversible(n){
    allOdd(reverse(n))
  }

  def allOdd(n){
    n.toString().toList().collect {it.toInteger()}.every{it % 2 == 1}
  }

  def reverse(n){
    n + n.toString().toList().reverse().join().toInteger()
  }
}