Scala Queue find() 方法示例

find()方法用于返回满足队列中给定谓词的元素。

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 Queue  
import scala.collection.mutable._
  
// Creating object 
object GfG 
{ 
  
    // Main method 
    def main(args:Array[String]) 
    { 
      
        // Creating queues 
        val q1 = Queue(1, 3, 2, 7, 6, 5) 
          
        // Print the queue
        println(q1)
          
        // Applying find method 
        val result = q1.find(x => {x % 7 == 0}) 
          
        // Displays output 
        print("Element divisible by 7: " + result)
    } 
} 

输出：

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

示例 #2：

// Scala program of find() 
// method 
  
// Import Queue  
import scala.collection.mutable._
  
// Creating object 
object GfG 
{ 
  
    // Main method 
    def main(args:Array[String]) 
    { 
      
        // Creating queues 
        val q1 = Queue(1, 3, 2, 7, 6, 5) 
          
        // Print the queue
        println(q1)
          
        // Applying find method 
        val result = q1.find(x => {x % 10 == 0}) 
          
        // Displays output 
        print("Element divisible by 10: " + result)
    } 
} 

输出：

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