Scala Stack init() 方法与示例

在 Scala Stack class中，init() 方法用于返回一个新堆栈，该堆栈由除最后一个元素之外的所有元素组成。

Method Definition: def init: Stack[A]

Return Type: It returns a new stack that consists of all the elements except the last one.

示例 #1：

// Scala program of init() 
// 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 init method  
        val result = s1.init 
          
        // Display output 
        print("Elements of the queue except the last one: " + result) 
         
    } 
} 

输出：

Stack(1, 3, 2, 7, 6, 5)
Elements of the queue except the last one: Stack(1, 3, 2, 7, 6)

示例 #2：

// Scala program of init() 
// 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 init method  
        val result = s1.init 
          
        // Display output 
        print("Elements of the queue except the last one: " + result) 
         
    } 
} 

输出：

Stack(5, 3, 2, 7, 6, 1)
Elements of the queue except the last one: Stack(5, 3, 2, 7, 6)