duankuai6991 2018-10-27 03:33
浏览 1996
已采纳

仅在golang中返回多个返回值的第一个结果

Absolute newbie question here.

Some functions in Go return more than one value (normally, the value and an error). I was writing a func who return the return value of one of those functions, and even if it is very easy to put the values on variables and return only the first one, I have the doubt if I could do the same in only one line without the extra variable. This is something often uses in other languages like C, Java, C#, Ruby, etc

func someFunc (param string) int {
   // do something with the string, not very important
   return strconv.Atoi(param) 
}

I know this works

func someFunc (param string) int {
   // do something with the string, not very important
   var result int
   result, _ = strconv.Atoi(param)
   return result 
}

It is this possible in Go? It is considered a "good practice" (like in Java*)

Note: Before someone say that this technique is not a good practice in Java, clarify that is not important for the question, but some people (like the ones in the company I work) encourage that style.

  • 写回答

1条回答 默认 最新

  • dpkk8687 2018-10-27 03:48
    关注

    Use a short variable declaration for the shortest code to accomplish this goal:

    func SomeFunc(parm string) int {
        result, _ := strconv.Atoi(param)
        return result
    }
    

    There is no one line solution without introducing a helper function that accepts two arguments and returns the first. One of these helper functions would be needed for each combination of types where you want to ignore a value.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

报告相同问题?

悬赏问题

  • ¥15 在获取boss直聘的聊天的时候只能获取到前40条聊天数据
  • ¥20 关于URL获取的参数,无法执行二选一查询
  • ¥15 液位控制,当液位超过高限时常开触点59闭合,直到液位低于低限时,断开
  • ¥15 marlin编译错误,如何解决?
  • ¥15 有偿四位数,节约算法和扫描算法
  • ¥15 VUE项目怎么运行,系统打不开
  • ¥50 pointpillars等目标检测算法怎么融合注意力机制
  • ¥20 Vs code Mac系统 PHP Debug调试环境配置
  • ¥60 大一项目课,微信小程序
  • ¥15 求视频摘要youtube和ovp数据集