带有示例的 Scala List takeWhile() 方法

只要满足所述条件，就使用takeWhile()方法从列表中查找元素。

Method Definition: def takeWhile(p: (A) => Boolean): List[A]

Return Type: It returns the elements from the list as long as the stated condition is satisfied.

示例 #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)

示例 #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()