Scala Iterator take() 方法与示例

take()方法属于抽象迭代器类的具体值成员。它用于选择所述迭代器的前n 个元素。

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

Where, n is the number of element to take from the given iterator.

Return Type: It returns the first n values from the stated iterator, or the whole iterator, whichever is shorter.

示例 #1：

// Scala program of take()
// method
  
// Creating object
object GfG
{ 
  
    // Main method
    def main(args:Array[String])
    {
      
        // Creating a Iterator 
        val iter = Iterator(2, 3, 5, 7, 8, 9)
          
        // Applying take method 
        val iter1 = iter.take(4)
          
        // Applying while loop and
        // hasNext() method
        while(iter1.hasNext)
        {
          
            // Applying next() method and
            // displaying output
            println(iter1.next())
        }
    }
}

输出：

2
3
5
7

在这里，前四个元素显示为我们在方法中选择了前四个元素。
示例 #2：

// Scala program of take()
// method
  
// Creating object
object GfG
{ 
  
    // Main method
    def main(args:Array[String])
    {
      
        // Creating a Iterator 
        val iter = Iterator(2, 3, 5, 7, 8, 9)
          
        // Applying take method 
        val iter1 = iter.take(7)
          
        // Applying while loop and
        // hasNext() method
        while(iter1.hasNext)
        {
          
            // Applying next() method and
            // displaying output
            println(iter1.next())
        }
    }
}

输出：

2
3
5
7
8
9

在这里，整个迭代器显示为比方法选择的元素数短的元素数。因此，显示较短的一个。