Scala List takeWhile()用法及代码示例

只要满足指定条件，就可以使用takeWhile()方法从列表中查找元素。

函数定义: def takeWhile(p: (A) => Boolean): List[A]

返回类型: It returns the elements from the list as long as the stated condition is satisfied.

范例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) 
      
    } 
}

输出：

List(1, 2, 3, 4)

范例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) 
      
    } 
}

输出：

List()

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 List takeWhile() 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。