在 Scala Stack class
,則使用head()方法返回堆棧的頂部元素。
函數定義: def head: A
返回類型: It returns the top element of the stack.
範例1:
// Scala program of head()
// method
// Import Stack
import scala.collection.mutable._
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
// Creating stack
val s1 = Stack(1, 3, 2, 7, 6, 5)
// Print the stack
println(s1)
// Applying head method
val result = s1.head
// Display output
print("Top element of the stack: " + result)
}
}
輸出:
Stack(1, 3, 2, 7, 6, 5) Top element of the stack: 1
範例2:
// Scala program of head()
// method
// Import Stack
import scala.collection.mutable._
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
// Creating stack
val s1 = Stack(5, 3, 2, 7, 6, 1)
// Print the stack
println(s1)
// Applying head method
val result = s1.head
// Display output
print("Top element of the stack: " + result)
}
}
輸出:
Stack(5, 3, 2, 7, 6, 1) Top element of the stack: 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 Stack head() 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。