Scala 不可变 TreeSet diff() 方法

在 Scala 不可变 TreeSet 类中， diff()方法用于查找两个 TreeSet 之间的差异。它从另一个 TreeSet 中删除存在于一个 TreeSet 中的元素。

Method Definition: def diff[B >: A](that: collection.Seq[B]): TreeSet[A]

Return Type: It returns a new TreeSet which consists of elements after the difference between the two given TreeSet.

示例 #1：

// Scala program of diff() 
// method 
  
// Import TreeSet
import scala.collection.immutable._
  
// Creating object 
object GfG 
{ 
  
    // Main method 
    def main(args:Array[String]) 
    { 
      
        // Creating TreeSet
        val t1 = TreeSet(1, 2, 3, 4, 5)  
            
        val t2 = TreeSet(3, 4, 5)  
            
        // Print the TreeSet 
        println("TreeSet_1: " + t1) 
            
        println("TreeSet_2: " + t2) 
            
        // Applying diff method  
        val result = t1.diff(t2)  
            
        // Displays output  
        print("(TreeSet_1 - TreeSet_2): " + result) 
          
    } 
} 

输出：

TreeSet_1: TreeSet(1, 2, 3, 4, 5)
TreeSet_2: TreeSet(3, 4, 5)
(TreeSet_1 - TreeSet_2): TreeSet(1, 2)

示例 #2：

// Scala program of diff() 
// method 
  
// Import TreeSet
import scala.collection.immutable._
  
// Creating object 
object GfG 
{ 
  
    // Main method 
    def main(args:Array[String]) 
    { 
      
        // Creating TreeSet
        val t1 = TreeSet(1, 2, 3, 4, 5)  
            
        val t2 = TreeSet(3, 4, 5, 6, 7, 8)  
            
        // Print the TreeSet 
        println("TreeSet_1: " + t1) 
            
        println("TreeSet_2: " + t2) 
            
        // Applying diff method  
        val result = t2.diff(t1)  
            
        // Displays output  
        print("(TreeSet_2 - TreeSet_1): " + result) 
          
    } 
} 

输出：

TreeSet_1: TreeSet(1, 2, 3, 4, 5)
TreeSet_2: TreeSet(3, 4, 5, 6, 7, 8)
(TreeSet_2 - TreeSet_1): TreeSet(6, 7, 8)