带有示例的 Scala Map empty() 方法

empty()方法用于使地图为空。

Method Definition: def empty: Map[A, B]

Return Type: It returns an empty map.

示例 #1：

// Scala program of empty()
// method
  
// Creating object
object GfG
{ 
  
    // Main method
    def main(args:Array[String])
    {
      
        // Creating a map
        val m1 = Map("geeks" -> 5, "for" -> 3, "cs" -> 2)
          
        // Applying empty method
        val result = m1.empty
          
        // Displays output
        println(result)
      
    }
}

输出：

Map()

示例 #2：

// Scala program of empty()
// method
  
// Creating object
object GfG
{ 
  
    // Main method
    def main(args:Array[String])
    {
      
        // Creating an empty map
        val m1 = Map()
          
        // Applying empty method
        val result = m1.empty
          
        // Displays output
        println(result)
      
    }
}

输出：

Map()