Scala Stack foreach() 方法与示例

在 Scala Stack class中， foreach()方法用于将给定函数应用于堆栈的所有元素。

Method Definition: def foreach[U](f: (A) => U): Unit

Return Type: It returns all the elements of the stack after applying the given function to each of them.

示例 #1：

// Scala program of foreach() 
// 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)  
            
        // Applying foreach method to print the stack 
        print("Elements in the stack: ") 
        s1.foreach(x => print(x + " "))
    } 
} 

输出：

Elements in the stack: 6 2 3 4 5

示例 #2：

// Scala program of foreach() 
// 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 foreach method  
        s1.foreach(x => println(x + " times " + x +" = " + x*x)) 
    } 
} 

输出：

Stack(6, 2, 3, 4, 5)
6 times 6 = 36
2 times 2 = 4
3 times 3 = 9
4 times 4 = 16
5 times 5 = 25