Scala List contains()用法及代码示例

contains()方法用于检查列表中是否存在某个元素。

函数定义: def contains(elem: Any): Boolean

返回类型: It returns true if the element present in the contains method as argument is also present in the stated list else it returns false.

范例1：

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

输出：

true

范例2：

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

输出：

false

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 contains() 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。