带有示例的 Scala Stack dropWhile() 方法
在 Scala Stack class
中, dropWhile()方法用于从顶部删除满足堆栈中给定谓词的最长前缀。
Method Definition: def dropWhile(p: (A) => Boolean): Stack[A]
Return Type: It returns a new stack that consists of elements after dropping the longest prefix satisfying the given predicate.
示例 #1:
// Scala program of dropWhile()
// method
// Import Stack
import scala.collection.mutable._
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
// Creating stack
val s1 = Stack(6, 2, 3, 4, 5)
// Print the stack
println(s1)
// Applying dropWhile method
val result = s1.dropWhile(x => {x % 2 == 0})
// Displays output
print("Stack after using dropWhile() method: " + result)
}
}
输出:
Stack(6, 2, 3, 4, 5)
Stack after using dropWhile() method: Stack(3, 4, 5)
示例 #2:
// Scala program of dropWhile()
// method
// Import Stack
import scala.collection.mutable._
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
// Creating stack
val s1 = Stack(1, 7, 2, 3, 4, 5)
// Print the stack
println(s1)
// Applying dropWhile method
val result = s1.dropWhile(x => {x % 2 != 0})
// Displays output
print("Stack after using dropWhile() method: " + result)
}
}
输出:
Stack(1, 7, 2, 3, 4, 5)
Stack after using dropWhile() method: Stack(2, 3, 4, 5)