带有示例的 Scala Queue map() 方法

map()方法用于通过将函数应用于此队列的所有元素来构建新队列。

Method Definition: def map[B](f: (A) => B): Queue[B]

Return Type: It returns a new queue containing all the elements after applying the given function.

示例 #1：

// Scala program of map() 
// method 
  
// Import Queue  
import scala.collection.mutable._
  
// Creating object 
object GfG 
{ 
  
    // Main method 
    def main(args:Array[String]) 
    { 
      
        // Creating a queue 
        val q1 = Queue(1, 3, 2, 7, 6, 5) 
          
        // Print the queue
        println(q1)
          
        // Applying map method 
        val result = q1.map(x => x*x)
          
        // Display output
        print("New queue after squaring all elements: " + result)
          
    } 
} 

输出：

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

示例 #2：

// Scala program of map() 
// method 
  
// Import Queue  
import scala.collection.mutable._
  
// Creating object 
object GfG 
{ 
  
    // Main method 
    def main(args:Array[String]) 
    { 
      
        // Creating a queue 
        val q1 = Queue(1, 3, 2, 7, 6, 5) 
          
        // Print the queue
        println(q1)
          
        // Applying map method 
        val result = q1.map(x => x/2)
          
        // Display output
        print("New queue after dividing all elements by 2: " + result)
          
    } 
} 

输出：

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