在Scala中一成不變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。
Method Definition: def filter(pred:(A) => Boolean):TreeSet[A]
Return Type: 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.immutable._
// 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.immutable._
// 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Shivam_k大神的英文原創作品 Scala immutable TreeSet filter() method。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。