Em chua hieu noi dung de lam :D

object p03 { def nth(n: Int, list: List[Int]):Int= if(list.size == 0 || list.size<=n) throw new Exception else list(n) //> nth: (n: Int, list: List[Int])Int nth(2, List(1, 1, 2, 3, 5, 8)) //> res0: Int = 2 //nth(2, List()) //nth(10,List(1)) }

object p04 { def length[A](list: List[A]): Int = list.length //> length: [A](list: List[A])Int length(List(1, 1, 2, 3, 5, 8)) //> res0: Int = 6 length(List()) //> res1: Int = 0 length(Nil) //> res2: Int = 0 }

object p05 { def reverse(list: List[Any]):List[Any]= list.reverse //> reverse: (list: List[Any])List[Any] reverse(List(1, 1, 2, 3, 5, 8)) //> res0: List[Any] = List(8, 5, 3, 2, 1, 1) reverse(List("a")) //> res1: List[Any] = List(a) reverse(Nil) //> res2: List[Any] = List() }

object p06 { def isPalindrome(list: List[Any]): Boolean = list.reverse == list //> isPalindrome: (list: List[Any])Boolean isPalindrome(List(1, 2, 3, 2, 1)) //> res0: Boolean = true isPalindrome(List(1, 2, 3, 1)) //> res1: Boolean = false isPalindrome(List(1)) //> res2: Boolean = true isPalindrome(List(1, 1)) //> res3: Boolean = true isPalindrome(List()) //> res4: Boolean = true }