在Scala中一成不变TreeSet class
,则使用foreach()方法将给定函数应用于TreeSet的所有元素。
Method Definition: def foreach[U](f:(A) => U):Unit
Return Type: It returns all the elements of the TreeSet after applying the given function to each of them.
范例1:
// Scala program of foreach()
// method
// Import TreeSet
import scala.collection.immutable._
// 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 foreach method to print the TreeSet
print("Elements in the TreeSet:")
t1.foreach(x => print(x + " "))
}
}
输出:
TreeSet(2, 4, 6, 7, 8, 9) Elements in the TreeSet:2 4 6 7 8 9
范例2:
// Scala program of foreach()
// method
// Import TreeSet
import scala.collection.immutable._
// 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 foreach method
t1.foreach(x => println(x + " times " + x +" = " + x*x))
}
}
输出:
TreeSet(2, 4, 6, 7, 8, 9) 2 times 2 = 4 4 times 4 = 16 6 times 6 = 36 7 times 7 = 49 8 times 8 = 64 9 times 9 = 81
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注:本文由纯净天空筛选整理自Shivam_k大神的英文原创作品 Scala immutable TreeSet foreach() method。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。