Added one more method to check power of 2

Author: yadavan88

scala-core-modules/scala-core-9/src/main/scala/com/baeldung/scala/powerof2/PowerOfTwo.scala

@@ -22,4 +22,8 @@ object PowerOfTwo {
     num > 0 && (num & (num - 1)) == 0
   }
 
+  def isPowerOfTwoByLazyList(num: Long): Boolean = {
+    num > 0 && LazyList.iterate(num)(_ / 2).takeWhile(_ > 1).forall(_ % 2 == 0)
+  }
+
 }

scala-core-modules/scala-core-9/src/test/scala/com/baeldung/scala/powerof2/PowerOfTwoUnitTest.scala

@@ -13,7 +13,8 @@ class PowerOfTwoUnitTest
   private val powerOfTwoFunctions = Seq(
     ("Division", PowerOfTwo.isPowerOfTwoByDivision),
     ("Counting Ones", PowerOfTwo.isPowerOfTwoByCountingOnes),
-    ("Bitwise AND", PowerOfTwo.isPowerOfTwoByBitwiseAnd)
+    ("Bitwise AND", PowerOfTwo.isPowerOfTwoByBitwiseAnd),
+    ("LazyList", PowerOfTwo.isPowerOfTwoByLazyList)
   )
 
   powerOfTwoFunctions.foreach { (desc, fn) =>