Scala TreeSet forall()方法及示例
在Scala TreeSet类中, forall() 方法被用来检查一个谓词是否对TreeSet的所有元素都成立。
方法定义: def forall(p: (A) => Boolean):Boolean
返回类型。如果谓词对TreeSet的所有元素都成立,则返回真,否则返回假。
例子 #1:
// Scala program of forall()
// method
// Import TreeSet
import scala.collection.mutable._
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
// Creating TreeSet
val t1 = TreeSet(2, 4, 6, 7, 8, 9)
// Print the TreeSet
println(t1)
// Applying forall() method
val result = t1.forall(x => {x % 7 == 0})
// Displays output
println("All the elements are divisible by 7: " + result)
}
}
输出。
TreeSet(2, 4, 6, 7, 8, 9)
All the elements are divisible by 7: false
例子#2。
// Scala program of forall()
// method
// Import TreeSet
import scala.collection.mutable._
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
// Creating TreeSet
val t1 = TreeSet(2, 4, 6, 8)
// Print the TreeSet
println(t1)
// Applying forall() method
val result = t1.forall(x => {x % 2 == 0})
// Displays output
println("All the elements are even: " + result)
}
}
输出。
TreeSet(2, 4, 6, 8)
All the elements are even: true