Scala Stack find() 方法示例

在 Scala Stack class中， find()方法用于返回满足堆栈中给定谓词的元素。

Method Definition: def find(p: (A) => Boolean): Option[A]

Return Type: It returns the first element that satisfies a given predicate if present or else it returns None.

示例 #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)
    } 
} 

输出：

Stack(1, 3, 2, 7, 6, 5)
Element divisible by 7: Some(7)

示例 #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)
    } 
} 

输出：

Stack(1, 3, 2, 7, 6, 5)
Element divisible by 10: None