带有示例的 Scala Map dropRight() 方法
dropRight()方法用于删除最后的“n”个元素。
Method Definition: def dropRight(n: Int): Map[A, B]
Return Type: It returns all the elements of the map except the last ‘n’ elements.
示例 #1:
// Scala program of dropRight()
// method
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
// Creating a map
val m1 = Map("geeks" -> 5, "for" -> 3, "cs" -> 5)
// Applying dropRight method
val result = m1.dropRight(1)
// Displays output
println(result)
}
}
输出:
Map(geeks -> 5, for -> 3)
示例 #2:
// Scala program of dropRight()
// method
// Creating object
object GfG
{
// Main method
def main(args:Array[String])
{
// Creating a map
val m1 = Map("geeks" -> 5, "for" -> 3)
// Applying dropRight method
val result = m1.dropRight(2)
// Displays output
println(result)
}
}
输出:
Map()
因此,这里返回一个空地图,因为地图的所有元素都被删除。