Scala SortedMap keys() 方法与示例
keys()方法用于为 SortedMap 的所有键提供迭代器。
Method Definition: def keys: Iterable[A]
Return Type: It returns an iterator over all the keys of the SortedMap.
示例 #1:
// Scala program of keys()
// method
import scala.collection.immutable.SortedMap
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
// Creating SortedMap
val m1 = SortedMap("geeks" -> 5, "for" -> 3, "cs" -> 2)
// Applying keys method
val result = m1.keys
// Displays output
println(result)
}
}
输出:
Set(cs, for, geeks)
示例 #2:
// Scala program of keys()
// method
import scala.collection.immutable.SortedMap
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
// Creating SortedMap
val m1 = SortedMap("geeks" -> 5, "for" -> 3, "geeks" -> 5)
// Applying keys method
val result = m1.keys
// Displays output
println(result)
}
}
输出:
Set(for, geeks)
因此,相同的密钥只被使用一次。