Scala Stack map()用法及代碼示例

在 Scala Stack class，則map()方法用於通過將函數應用於給定堆棧的所有元素來構建新堆棧。

函數定義: def map[B](f: (A) => B): Stack[B]

返回類型: It returns a new stack containing all the elements after applying the given function.

範例1：

// Scala program of map()  
// method  
  
// Import Stack  
import scala.collection.mutable._
  
// Creating object  
object GfG  
{  
  
    // Main method  
    def main(args:Array[String])  
    {  
      
        // Creating stack 
        val s1 = Stack(5, 3, 2, 7, 6, 1)  
          
        // Print the stack  
        println(s1)  
           
        // Applying map method   
        val result = s1.map(x => x*x) 
          
        // Display output  
        print("New stack after squaring all elements: " + result)  
         
    }  
}

輸出：

Stack(5, 3, 2, 7, 6, 1)
New stack after squaring all elements: Stack(25, 9, 4, 49, 36, 1)

範例2：

// Scala program of map()  
// method  
  
// Import Stack  
import scala.collection.mutable._
  
// Creating object  
object GfG  
{  
  
    // Main method  
    def main(args:Array[String])  
    {  
      
        // Creating stack 
        val s1 = Stack(1, 3, 2, 7, 6, 5)  
          
        // Print the stack  
        println(s1)  
           
        // Applying map method   
        val result = s1.map(x => x/2) 
          
        // Display output  
        print("New queue after dividing all elements by 2: " + result)  
         
    }  
}

輸出：

Stack(1, 3, 2, 7, 6, 5)
New queue after dividing all elements by 2: Stack(0, 1, 1, 3, 3, 2)

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注：本文由純淨天空篩選整理自rupesh_rao大神的英文原創作品 Scala Stack map() method with example。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。