Scala Map dropWhile()用法及代碼示例

使用dropWhile()方法刪除元素，直到滿足指定條件為止。

函數定義: def dropWhile(p: ((A, B)) => Boolean): Map[A, B]

返回類型: It returns the longest suffix of elements of the stated map whose first element does not satisfies the predicate p.

範例1：

// Scala program of dropWhile() 
// method 
  
// Creating object 
object GfG 
{  
  
    // Main method 
    def main(args:Array[String]) 
    { 
      
        // Creating a map 
        val m1 = Map("geeks" -> 5, "for" -> 3, "cs" -> 2) 
          
        // Applying dropWhile method 
        val result = m1.dropWhile(z=>false)  
          
        // Displays output 
        println(result) 
      
    } 
}

輸出：

Map(geeks -> 5, for -> 3, cs -> 2)

範例2：

// Scala program of dropWhile() 
// method 
  
// Creating object 
object GfG 
{  
  
    // Main method 
    def main(args:Array[String]) 
    { 
      
        // Creating a map 
        val m1 = Map("geeks" -> 5, "for" -> 3, "cs" -> 2) 
          
        // Applying dropWhile method 
        val result = m1.dropWhile(z=>true)  
          
        // Displays output 
        println(result) 
          
    } 
}

輸出：

Map()

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 Map 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。