當前位置: 首頁>>代碼示例 >>用法及示例精選 >>正文


Scala immutable TreeSet filter()用法及代碼示例


在Scala中一成不變TreeSet class,則使用filter()方法返回一個新的TreeSet,該樹集由滿足給定謂詞的所有元素組成。

Method Definition: def filter(pred:(A) => Boolean):TreeSet[A]

Return Type: It returns a new TreeSet that consists of all the elements that satisfy a given predicate.

範例1:

// Scala program of filter()  
// method  
  
// Import TreeSet 
import scala.collection.immutable._
  
// Creating object  
object GfG  
{  
  
    // Main method  
    def main(args:Array[String])  
    {  
      
        // Creating TreeSet 
        val t1 = TreeSet(1, 3, 2, 7, 6, 5)  
          
        // Print the TreeSet 
        println(t1)  
          
        // Applying filter() method   
        val result = t1.filter(x => {x % 2 == 1}) 
          
        // Displays output  
        println("Odd Elements:" + result) 
          
    }  
} 
輸出:
TreeSet(1, 2, 3, 5, 6, 7)
Odd Elements:TreeSet(1, 3, 5, 7)

範例2:

// Scala program of filter()  
// method  
  
// Import TreeSet 
import scala.collection.immutable._
  
// Creating object  
object GfG  
{  
  
    // Main method  
    def main(args:Array[String])  
    {  
      
        // Creating TreeSet 
        val t1 = TreeSet(1, 3, 2, 7, 6, 5)  
          
        // Print the TreeSet 
        println(t1)  
          
        // Applying filter() method   
        val result = t1.filter(x => {x % 2 == 0}) 
          
        // Displays output  
        println("Even Elements:" + result) 
          
    }  
} 
輸出:
TreeSet(1, 2, 3, 5, 6, 7)
Even Elements:TreeSet(2, 6)



相關用法


注:本文由純淨天空篩選整理自Shivam_k大神的英文原創作品 Scala immutable TreeSet filter() method。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。