Scala Iterator filter()用法及代碼示例

filter()方法屬於AbstractIterator類的具體值成員。它在類Iterator和IterableOnceOps中定義。它選擇滿足所使用謂詞的指定迭代器的所有元素。

函數定義： def filter(p:(A) => Boolean):Iterator[A]

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

範例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) 
      
    } 
}

輸出：

範例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) 
      
    } 
}

輸出：

相關用法

注：本文由純淨天空篩選整理自nidhi1352singh大神的英文原創作品 Scala Iterator filter() method with example。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。