Scala List takeWhile()用法及代碼示例

隻要滿足指定條件，就可以使用takeWhile()方法從列表中查找元素。

函數定義: def takeWhile(p: (A) => Boolean): List[A]

返回類型: It returns the elements from the list as long as the stated condition is satisfied.

範例1：

// Scala program of takeWhile() 
// method 
  
// Creating object 
object GfG 
{  
  
    // Main method 
    def main(args:Array[String]) 
    { 
      
        // Creating a list 
        val m1 = List(1, 2, 3, 4, 5, 7) 
          
        // Applying takeWhile method 
        val result = m1.takeWhile(_ < 5) 
          
        // Displays output 
        println(result) 
      
    } 
}

輸出：

List(1, 2, 3, 4)

範例2：

// Scala program of takeWhile() 
// method 
  
// Creating object 
object GfG 
{  
  
    // Main method 
    def main(args:Array[String]) 
    { 
      
        // Creating a list 
        val m1 = List(1, 2, 3, 4, 5, 7) 
          
        // Applying takeWhile method 
        val result = m1.takeWhile(_ > 4) 
          
        // Displays output 
        println(result) 
      
    } 
}

輸出：

List()

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 List takeWhile() 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。