dropWhile()方法用於從前麵丟棄最長的前綴,該前綴滿足隊列中給定謂詞的要求。
函數定義: def dropWhile(p: (A) => Boolean): Queue[A]
返回類型: It returns a new queue that consists of elements after dropping the longest prefix satisfying the given predicate.
範例1:
// Scala program of dropWhile()
// method
// Import Queue
import scala.collection.mutable._
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
// Creating queues
val q1 = Queue(2, 4, 6, 1, 8, 3, 5)
// Print the queue
println(q1)
// Applying dropWhile method
val result = q1.dropWhile(x => {x % 2 == 0})
// Displays output
print("Queue after using dropWhile() method: " + result)
}
}
輸出:
Queue(2, 4, 6, 1, 8, 3, 5) Queue after using dropWhile() method: Queue(1, 8, 3, 5)
範例2:
// Scala program of dropWhile()
// 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 dropWhile method
val result = q1.dropWhile(x => {x % 2 != 0})
// Displays output
print("Queue after using dropWhile() method: " + result)
}
}
輸出:
Queue(1, 3, 2, 7, 6, 5) Queue after using dropWhile() method: Queue(2, 7, 6, 5)
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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 Queue dropWhile() 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。