Scala Map toList() 方法与示例

toList()方法用于在列表中显示地图的元素。

Method Definition: def toList: List[A]

Return Type: It returns all the elements of the map in the list.

示例 #1：

// Scala program of toList()
// method
  
// Creating object
object GfG
{ 
  
    // Main method
    def main(args:Array[String])
    {
      
        // Creating a map
        val m1 = Map(3 -> "geeks", 4 -> "for", 2 -> "cs")
          
        // Applying toList method
        val result = m1.toList
          
        // Displays output
        println(result)
      
    }
}

输出：

List((3, geeks), (4, for), (2, cs))

示例 #2：

// Scala program of toList()
// method
  
// Creating object
object GfG
{ 
  
    // Main method
    def main(args:Array[String])
    {
      
        // Creating a map
        val m1 = Map(3 -> "geeks", 4 -> "for", 4 -> "for")
          
        // Applying toList method
        val result = m1.toList
          
        // Displays output
        println(result)
      
    }
}

输出：

List((3, geeks), (4, for))