Scala Iterator dropWhile()用法及代碼示例

dropWhile()方法屬於類Abstract Iterator的具體值成員。它在類Iterator和IterableOnceOps中定義。它刪除滿足指定謂詞的元素的最長前綴。

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

Where, p is the predicate to be used.

返回類型： It returns the longest suffix of the stated iterator whose first element does not satisfies the used predicate.

範例1：

// Scala program of dropWhile() 
// method 
  
// Creating object 
object GfG 
{  
  
    // Main method 
    def main(args:Array[String]) 
    { 
      
        // Creating an Iterator  
        val iter = Iterator(2, 3, 4, 6, 7) 
          
        // Applying dropWhile method 
        val x = iter.dropWhile(x => {x < 5}) 
          
        // Applying next method 
        val result = x.next() 
          
        // Displays output 
        println(result) 
    } 
}

輸出：

範例2：

// Scala program of dropWhile() 
// method 
  
// Creating object 
object GfG 
{  
  
    // Main method 
    def main(args:Array[String]) 
    { 
      
        // Creating an Iterator  
        val iter = Iterator(7, 3, 4, 6, 7) 
          
        // Applying dropWhile method 
        val x = iter.dropWhile(x => {x % 2 != 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 dropWhile() 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。