Scala TreeSet dropWhile() 方法及示例

在Scala TreeSet类中， dropWhile() 方法用于在TreeSet中删除满足给定谓词的最长前缀。

方法定义: def dropWhile(p: (A) => Boolean): TreeSet[A]

返回类型: 返回一个新的TreeSet，其中包含删除满足给定谓词的最长前缀之后的元素。

示例#1:

// Scala program of dropWhile()
// method

// Import TreeSet
import scala.collection.mutable._

// 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)

    } 
} 

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

示例#2:

// Scala program of dropWhile() 
// method 

// Import TreeSet
import scala.collection.mutable._

// 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)

    } 
} 

TreeSet(3, 5, 6, 7, 8, 9)
TreeSet after using dropWhile() method: TreeSet(6, 7, 8, 9)

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