在 Scala TreeSet class
,則使用filter()方法返回一個新的TreeSet,該樹集由滿足給定謂詞的所有元素組成。
函數定義: def filter(pred: (A) => Boolean): TreeSet[A]
返回類型: It returns a new TreeSet that consists of all the elements that satisfy a given predicate.
範例1:
// Scala program of filter()
// method
// Import TreeSet
import scala.collection.mutable._
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
// Creating TreeSet
val t1 = TreeSet(1, 3, 2, 7, 6, 5)
// Print the TreeSet
println(t1)
// Applying filter() method
val result = t1.filter(x => {x % 2 == 1})
// Displays output
println("Odd Elements: " + result)
}
}
輸出:
TreeSet(1, 2, 3, 5, 6, 7) Odd Elements: TreeSet(1, 3, 5, 7)
範例2:
// Scala program of filter()
// method
// Import TreeSet
import scala.collection.mutable._
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
// Creating TreeSet
val t1 = TreeSet(1, 3, 2, 7, 6, 5)
// Print the TreeSet
println(t1)
// Applying filter() method
val result = t1.filter(x => {x % 2 == 0})
// Displays output
println("Even Elements: " + result)
}
}
輸出:
TreeSet(1, 2, 3, 5, 6, 7) Even Elements: TreeSet(2, 6)
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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 TreeSet filter() 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。