Scala Stream head() 方法与示例

head()方法用于显示所述流的第一个元素。

Method Definition: def head: A

Return Type: It returns the first element of the stated Stream.

示例 #1：

// Scala program of head()
// method
  
// Creating object
object GfG
{ 
  
    // Main method
    def main(args:Array[String])
    {
      
        // Creating a Stream
        val m1 = Stream(3, 6, 7, 4)
          
        // Applying head method
        val result = m1.head
          
        // Displays output
        println(result)
      
    }
}

输出：

3

示例 #2：

// Scala program of head()
// method
   
// Creating object
object GfG
{  
     
    // Main method
    def main(args:Array[String])
    {
        
        // Creating a Stream
        val m1 = Stream(6, 8, 9, 12)
            
        // Applying head method
        val result = m1.head
             
        // Displays output
        println(result)
        
    }
}

输出：

6