Scala Map size() 方法与示例

size()用于查找所述映射中键值对的数量。

Method Definition: def size: Int

Return Type: It returns the number of elements in the map.

示例 #1：

// Scala program of size()
// method
  
// Creating object
object GfG
{ 
  
    // Main method
    def main(args:Array[String])
    {
      
        // Creating a map
        val m1 = Map(3 -> "geeks", 1 -> "for", 2 -> "cs")
          
        // Applying size method
        val result = m1.size
          
        // Displays output
        println(result)
      
    }
}

输出：

3

示例 #2：

// Scala program of size()
// method
  
// Creating object
object GfG
{ 
  
    // Main method
    def main(args:Array[String])
    {
      
        // Creating a map
        val m1 = Map(3 -> "geeks", 1 -> "for", 1 -> "cs")
          
        // Applying size method
        val result = m1.size
          
        // Displays output
        println(result)
          
    }
}

输出：

2