Scala Iterator filter()用法及代码示例

filter()方法属于AbstractIterator类的具体值成员。它在类Iterator和IterableOnceOps中定义。它选择满足所使用谓词的指定迭代器的所有元素。

函数定义： def filter(p:(A) => Boolean):Iterator[A]

返回类型： It returns a new iterator containing all the elements of the stated iterator which satisfies the given predicate.

范例1：

// Scala program of filter() 
// method 
  
// Creating object 
object GfG 
{  
  
    // Main method 
    def main(args:Array[String]) 
    { 
      
        // Creating an Iterator  
        val iter = Iterator(7, 8, 5, 4, 13) 
          
        // Applying filter method 
        val x = iter.filter(x => {x % 2 == 0}) 
          
        // Applying next method 
        val result = x.next() 
          
        // Displays output 
        println(result) 
      
    } 
}

输出：

范例2：

// Scala program of filter() 
// method 
  
// Creating object 
object GfG 
{  
  
    // Main method 
    def main(args:Array[String]) 
    { 
      
        // Creating an Iterator  
        val iter = Iterator(3, 9, 5, 1, 13) 
          
        // Applying filter method 
        val x = iter.filter(x => {x % 3 != 0}) 
          
        // Applying next method 
        val result = x.next() 
          
        // Displays output 
        println(result) 
      
    } 
}

输出：

相关用法

注：本文由纯净天空筛选整理自nidhi1352singh大神的英文原创作品 Scala Iterator filter() method with example。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。