带有示例的 Scala 迭代器 drop() 方法

drop()方法属于Abstract Iterator类的具体值成员。它在Iterator和IterableOnceOps类中定义。它用于将迭代器向前移动n位，如果n大于迭代器的长度，则会抛出异常。

Method Definition : def drop(n: Int): Iterator[A]

Where, n is the number of elements to be dropped from the stated iterator.

Return Type : It returns all the elements of the stated iterator except the first n ones.

示例 #1：

// Scala program of drop()
// method
  
// Creating object
object GfG
{ 
  
    // Main method
    def main(args:Array[String])
    {
      
        // Creating an Iterator 
        val iter = Iterator(4, 6, 10, 11, 13)
          
        // Applying drop method
        val x = iter.drop(4)
          
        // Applying next method
        val result = x.next()
          
        // Displays output
        println(result)
      
    }
}

输出：

13

在这里，前四个元素被删除，之后的所有元素都被返回。
示例 #2：

// Scala program of drop()
// method
  
// Creating object
object GfG
{ 
  
    // Main method
    def main(args:Array[String])
    {
      
        // Creating an Iterator 
        val iter = Iterator(2, 3, 4)
          
        // Applying drop method
        val x = iter.drop(1)
          
        // Applying next method
        val result = x.next()
          
        // Displays output
        println(result)
          
    }
}

输出：

3