Scala TreeSet count()方法及示例
在Scala TreeSet类中, count() 方法被用来计算TreeSet中满足给定谓词的元素数量。
方法定义: def count(p: (A) => Boolean):Int
返回类型。它返回TreeSet中满足给定谓词的元素的数量。
例子 #1:
// Scala program of count()
// method
// Import TreeSet
import scala.collection.mutable._
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
// Creating TreeSet
val t1 = TreeSet(2, 1, 3, 4, 5)
// Print the TreeSet
println(t1)
// Applying count() method
val result = t1.count(x => {x % 2 == 0})
// Display output
print("Number of even element in the TreeSet: " + result)
}
}
输出。
TreeSet(1, 2, 3, 4, 5)
Number of even element in the TreeSet: 2
例子#2。
// Scala program of count()
// method
// Import TreeSet
import scala.collection.mutable._
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
// Creating TreeSet
val t1 = TreeSet(2, 1, 3, 4, 5)
// Print the TreeSet
println(t1)
// Applying count() method
val result = t1.count(x => {x % 2 != 0})
// Display output
print("Number of odd element in the TreeSet: " + result)
}
}
输出。
TreeSet(1, 2, 3, 4, 5)
Number of odd element in the TreeSet: 3
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