Scala Queue exists() 方法示例
exists()方法用于检查谓词是否适用于队列中的任何元素。
Method Definition: def exists(p: (A) => Boolean): Boolean
Return Type: It returns true if the predicate holds true for any of the elements of the queue or else returns false.
示例 #1:
// Scala program of exists()
// 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 exists method
val result = q1.exists(x => {x % 7 == 0})
// Displays output
print("Element divisible by 7 exists: " + result)
}
}
输出:
Queue(1, 3, 2, 7, 6, 5)
Element divisible by 7 exists: true
示例 #2:
// Scala program of exists()
// 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 exists method
val result = q1.exists(x => {x == 10})
// Displays output
print("Element 10 exists: " + result)
}
}
输出:
Queue(1, 3, 2, 7, 6, 5)
Element 10 exists: false