Scala Stack dropWhile()用法及代码示例

在 Scala Stack class，则使用dropWhile()方法从顶部放下满足堆栈中给定谓词的最长前缀。

函数定义: def dropWhile(p: (A) => Boolean): Stack[A]

返回类型: It returns a new stack that consists of elements after dropping the longest prefix satisfying the given predicate.

范例1：

// Scala program of dropWhile()  
// method  
  
// Import Stack  
import scala.collection.mutable._
  
// Creating object  
object GfG  
{  
  
    // Main method  
    def main(args:Array[String])  
    {  
      
        // Creating stack   
        val s1 = Stack(6, 2, 3, 4, 5)   
            
        // Print the stack  
        println(s1)   
          
        // Applying dropWhile method   
        val result = s1.dropWhile(x => {x % 2 == 0})  
            
        // Displays output   
        print("Stack after using dropWhile() method: " + result) 
    }  
}

输出：

Stack(6, 2, 3, 4, 5)
Stack after using dropWhile() method: Stack(3, 4, 5)

范例2：

// Scala program of dropWhile()  
// method  
  
// Import Stack  
import scala.collection.mutable._
  
// Creating object  
object GfG  
{  
  
    // Main method  
    def main(args:Array[String])  
    {  
      
        // Creating stack   
        val s1 = Stack(1, 7, 2, 3, 4, 5)   
            
        // Print the stack  
        println(s1)   
          
        // Applying dropWhile method   
        val result = s1.dropWhile(x => {x % 2 != 0})  
            
        // Displays output   
        print("Stack after using dropWhile() method: " + result) 
    }  
}

输出：

Stack(1, 7, 2, 3, 4, 5)
Stack after using dropWhile() method: Stack(2, 3, 4, 5)

相关用法

注：本文由纯净天空筛选整理自rupesh_rao大神的英文原创作品 Scala Stack dropWhile() method with example。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。