带有示例的 Scala TreeSet exists() 方法
在 Scala TreeSet class
中, exists()方法用于检查谓词是否适用于 TreeSet 的任何元素。
Method Definition: def exists(p: (A) => Boolean): Boolean
Return Type: It returns true if the predicate holds true for any of the elements of the TreeSet or else returns false.
示例 #1:
// Scala program of exists()
// 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 exists() method
val result = t1.exists(x => {x % 7 == 0})
// Displays output
println("Element divisible by 7 exists: " + result)
}
}
输出:
TreeSet(1, 2, 3, 5, 6, 7)
Element divisible by 7 exists: true
示例 #2:
// Scala program of exists()
// 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 exists() method
val result = t1.exists(x => {x == 10})
// Displays output
println("Element 10 exists: " + result)
}
}
输出:
TreeSet(1, 2, 3, 5, 6, 7)
Element 10 exists: false