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Scala Stack find()用法及代碼示例

在 Scala Stack class,則使用find()方法返回滿足堆棧中給定謂詞的元素。

函數定義: def find(p: (A) => Boolean): Option[A]

返回類型: It returns the first element that satisfies a given predicate if present or else it returns None.



範例1:

// Scala program of find()  
// 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 find method   
        val result = s1.find(x => {x % 7 == 0})  
          
        // Display output 
        println("Element divisible by 7: " + result) 
    }  
} 
輸出:
Stack(1, 3, 2, 7, 6, 5)
Element divisible by 7: Some(7)

範例2:

// Scala program of find()  
// 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 find method   
        val result = s1.find(x => {x % 10 == 0})  
          
        // Display output 
        println("Element divisible by 10: " + result) 
    }  
} 
輸出:
Stack(1, 3, 2, 7, 6, 5)
Element divisible by 10: None


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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 find() 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。