Scala 不可变 TreeSet dropRight() 方法

在 Scala 不可变TreeSet class中，使用dropRight()方法删除 TreeSet 的最后“n”个元素。

Method Definition: def dropRight(n: Int): TreeSet[A]

Return Type: It returns a new TreeSet that consists of all the elements except the last ‘n’ elements.

示例 #1：

// Scala program of dropRight() 
// method 
  
// Import TreeSet
import scala.collection.immutable._
  
// Creating object 
object GfG 
{ 
  
    // Main method 
    def main(args:Array[String]) 
    { 
      
        // Creating TreeSet
        val t1 = TreeSet(2, 4, 6, 7, 8, 9) 
          
        // Print the TreeSet
        println(t1) 
          
        // Applying dropRight() method  
        val result = t1.dropRight(2)
          
        // Displays output 
        println("Queue after using dropRight(2) method: " + result)
          
    } 
} 

输出：

TreeSet(2, 4, 6, 7, 8, 9)
Queue after using dropRight(2) method: TreeSet(2, 4, 6, 7)

示例 #2：

// Scala program of dropRight() 
// method 
  
// Import TreeSet
import scala.collection.immutable._
  
// Creating object 
object GfG 
{ 
  
    // Main method 
    def main(args:Array[String]) 
    { 
      
        // Creating TreeSet
        val t1 = TreeSet(2, 4, 6, 7, 8, 9) 
          
        // Print the TreeSet
        println(t1) 
          
        // Applying dropRight() method  
        val result = t1.dropRight(4)
          
        // Displays output 
        println("Queue after using dropRight(4) method: " + result)
          
    } 
} 

输出：

TreeSet(2, 4, 6, 7, 8, 9)
Queue after using dropRight(4) method: TreeSet(2, 4)