Scala Mutable SortedMap dropWhile()用法及代码示例

dropWhile()方法用于删除元素，直到满足指定条件为止。

Method Definition: def dropWhile(p:((A, B)) => Boolean):SortedMap[A, B]

Return Type: It returns the longest suffix of elements of the stated SortedMap whose first element does not satisfies the predicate p.

范例1：

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

输出：

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

范例2：

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

输出：

Map()

相关用法

注：本文由纯净天空筛选整理自Shivam_k大神的英文原创作品 Scala Mutable SortedMap dropWhile() 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。