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Scala immutable TreeSet dropWhile()用法及代码示例


在Scala中一成不变TreeSet class,则dropWhile()方法用于从前面丢弃最长的前缀,该前缀满足TreeSet中的给定谓词。

Method Definition: def dropWhile(p:(A) => Boolean):TreeSet[A]

Return Type: It returns a new TreeSet that consists of elements after dropping the longest prefix satisfying the given predicate.

范例1:

// Scala program of dropWhile()  
// 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 dropWhile() method   
        val result = t1.dropWhile(x => {x % 2 == 0}) 
          
        // Displays output  
        println("TreeSet after using dropWhile() method:" + result) 
          
    }  
} 
输出:
TreeSet(2, 4, 6, 7, 8, 9)
TreeSet after using dropWhile() method:TreeSet(7, 8, 9)

范例2:

// Scala program of dropWhile()  
// method  
  
// Import TreeSet 
import scala.collection.immutable._
  
// Creating object  
object GfG  
{  
  
    // Main method  
    def main(args:Array[String])  
    {  
      
        // Creating TreeSet 
        val t1 = TreeSet(3, 5, 6, 7, 8, 9)  
          
        // Print the TreeSet 
        println(t1)  
          
        // Applying dropWhile() method   
        val result = t1.dropWhile(x => {x % 2 != 0}) 
          
        // Displays output  
        println("TreeSet after using dropWhile() method:" + result) 
          
    }  
} 
输出:
TreeSet(3, 5, 6, 7, 8, 9)
TreeSet after using dropWhile() method:TreeSet(6, 7, 8, 9)



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注:本文由纯净天空筛选整理自Shivam_k大神的英文原创作品 Scala immutable TreeSet dropWhile() method。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。