在 Scala Stack class
,则使用filter()方法返回一个新堆栈,该堆栈由满足给定谓词的所有元素组成。
函数定义: def filter(pred: (A) => Boolean): Stack[A]
返回类型: It returns a new stack that consists of all the elements that satisfy a given predicate.
范例1:
// Scala program of filter()
// 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 filter method
val result = s1.filter(x => {x % 2 == 1})
// Display output
println("Odd elements: " + result)
}
}
输出:
Stack(1, 3, 2, 7, 6, 5) Odd elements: Stack(1, 3, 7, 5)
范例2:
// Scala program of filter()
// 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 filter method
val result = s1.filter(x => {x % 3 == 0})
// Display output
println("Elements divisible by 3: " + result)
}
}
输出:
Stack(1, 3, 2, 7, 6, 5) Elements divisible by 3: Stack(3, 6)
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注:本文由纯净天空筛选整理自rupesh_rao大神的英文原创作品 Scala Stack filter() method with example。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。