Scala Stack pop()用法及代碼示例

在 Scala Stack class，則使用pop()方法刪除並返回堆棧頂部的元素。

函數定義: def pop(): A

返回類型: It removes and returns the element at the top of the stack.

範例1：

// Scala program of pop()  
// method  
  
import scala.collection.mutable.Stack  
  
// Creating object  
object GfG  
{  
      
    // Main method  
    def main(args:Array[String])  
    {  
          
        // Creating a stack 
        var s = Stack("C++", "Java", "Python", "Scala")  
          
        // Print the stack 
        println(s) 
          
        // Print the top of the stack 
        println("Top of the stack: " + s.top) 
  
        // Applying pop method     
        val result = s.pop 
          
        // Print the popped element 
        println("Popped element: " + result)  
  
    }  
}

輸出：

Stack(C++, Java, Python, Scala)
Top of the stack: C++
Popped element: C++

範例2：

// Scala program of pop()  
// method  
  
import scala.collection.mutable.Stack  
  
// Creating object  
object GfG  
{  
      
    // Main method  
    def main(args:Array[String])  
    {  
          
        // Creating a stack 
        var s = Stack(1, 2, 3, 4)  
          
        // Print the stack 
        println(s) 
          
        // Print the top of the stack 
        println("Top of the stack: " + s.top) 
  
        // Applying pop method     
        val result = s.pop 
          
        // Print the popped element 
        println("Popped element: " + result)  
  
    }  
}

輸出：

Stack(1, 2, 3, 4)
Top of the stack: 1
Popped element: 1

相關用法

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