带有示例的 Scala Stack /:() 方法
在 Scala 中，scala.collection.mutable 实现了 Stack 数据结构。 /: 方法将二元运算符应用于起始值和此可遍历或迭代器的所有元素，从左到右。
Method Definition – def /:[B](z: B)(op: (B, A) ? B): B
Returns – the result of inserting op between consecutive elements of this traversable or iterator.
Example #1:
// Scala program of mutable stack /:()
// method
// Import Stack
import scala.collection.mutable._
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
val st1 = Stack(1, 2, 3)
// Applying /:() method
val result1 = (16 /: st1)(_+_)
val result2 = (16 /: st1)(_-_)
// Display output
print(result1)
print("\n")
print(result2)
}
}
Output:
22
10
Example #2:
// Scala program of mutable stack /:() method
// Import Stack
import scala.collection.mutable._
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
// Creating a stack
val q2 = List(11, 12, 13, 14, 15)
// Applying /:() method
val result = (6 /: q2)(_+_)
// Display output
print(result)
}
}
Output:
71