带有示例的 Scala 列表 dropWhile() 方法

dropWhile()方法用于删除满足规定条件的元素的最长前缀。

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

Return Type: It returns all the elements of the list except the dropped ones.

示例 #1：

// Scala program of dropWhile()
// method
  
// Creating object
object GfG
{ 
  
    // Main method
    def main(args:Array[String])
    {
      
        // Creating a list
        val m1 = List(1, 3, 5, 4, 2)
          
        // Applying dropWhile method
        val res = m1.dropWhile(x=>{x % 2 != 0})
          
        // Displays output
        println(res)
      
    }
}

输出：

List(4, 2)

示例 #2：

// Scala program of dropWhile()
// method
  
// Creating object
object GfG
{ 
  
    // Main method
    def main(args:Array[String])
    {
      
        // Creating a list
        val m1 = List(3, 6, 5, 4, 2)
          
        // Applying dropWhile method
        val res = m1.dropWhile(x=>{x % 3 == 0})
          
        // Displays output
        println(res)
      
    }
}

输出：

List(5, 4, 2)