Go中函数重载的替代方法？

Question

Is it possible to work similar way like the function overloading or optional parameter in C# using Golang? Or maybe an alternative way?

Answer 1

Neither function overloading nor optional arguments are directly supported. You could work around them building your own arguments struct. I mean like this (untested, may not work...) EDIT: now tested...

package main

    import "fmt"

    func main() {
        args:=NewMyArgs("a","b") // filename is by default "c"
        args.SetFileName("k")

        ret := Compresser(args)
        fmt.Println(ret)
    }

    func Compresser(args *MyArgs) string {
        return args.dstFilePath + args.srcFilePath + args.fileName 
    }

    // a struct with your arguments
    type MyArgs struct 
    {
        dstFilePath, srcFilePath, fileName string 
    }

   // a "constructor" func that gives default values to args 
    func NewMyArgs(dstFilePath string, srcFilePath string) *MyArgs {
        return &MyArgs{
              dstFilePath: dstFilePath, 
              srcFilePath:srcFilePath, 
              fileName :"c"}
    }

    func (a *MyArgs) SetFileName(value string){
      a.fileName=value;
    }