Scala List +()运算符示例

Scala 中的+()运算符用于将元素附加到列表中。

Method Definition: def +(elem: A): List[A]

Return Type: It returns a list of the stated elements after appending it to an another element.

示例 #1：

// Scala program of +()
// method
  
// Creating object
object GfG
{ 
  
    // Main method
    def main(args:Array[String])
    {
      
        // Creating a list
        val m1 = List(1, 2, 3)
          
        // Applying + operator
        val res = m1.+("10")
          
        // Displays output
        println(res)
      
    }
}

输出：

List(1, 2, 3)10

示例 #2：

// Scala program of +()
// method
  
// Creating object
object GfG
{ 
  
    // Main method
    def main(args:Array[String])
    {
      
        // Creating a list
        val m1 = List()
          
        // Applying + operator
        val res = m1.+("10")
          
        // Displays output
        println(res)
      
    }
}

输出：

List()10