Scala Queue contains() 方法和示例
contains()方法用于测试队列中是否存在元素。
Method Definition: def contains[A1 >: A](elem: A1): Boolean
Return Type: It returns true if the element is present in the queue, else it returns false.
示例 #1:
// Scala program of contains()
// method
// Import Queue
import scala.collection.mutable._
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
// Creating a queue
val q1 = Queue(10, 11, 12, 13, 14)
// Print the queue
println(q1)
// Applying contains() method
val result = q1.contains(12)
// Display output
print("Queue contains 12: " + result)
}
}
输出:
Queue(10, 11, 12, 13, 14)
Queue contains 12: true
示例 #2:
// Scala program of contains()
// method
// Import Queue
import scala.collection.mutable._
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
// Creating a queue
val q1 = Queue(10, 11, 12, 13, 14)
// Print the queue
println(q1)
// Applying contains() method
val result = q1.contains(20)
// Display output
print("Queue contains 20: " + result)
}
}
输出:
Queue(10, 11, 12, 13, 14)
Queue contains 20: false