在 Scala Stack class
,則map()方法用於通過將函數應用於給定堆棧的所有元素來構建新堆棧。
函數定義: def map[B](f: (A) => B): Stack[B]
返回類型: It returns a new stack containing all the elements after applying the given function.
範例1:
// Scala program of map()
// 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 map method
val result = s1.map(x => x*x)
// Display output
print("New stack after squaring all elements: " + result)
}
}
輸出:
Stack(5, 3, 2, 7, 6, 1) New stack after squaring all elements: Stack(25, 9, 4, 49, 36, 1)
範例2:
// Scala program of map()
// 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 map method
val result = s1.map(x => x/2)
// Display output
print("New queue after dividing all elements by 2: " + result)
}
}
輸出:
Stack(1, 3, 2, 7, 6, 5) New queue after dividing all elements by 2: Stack(0, 1, 1, 3, 3, 2)
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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 map() 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。