如何在Golang中使用此功能？

Question

Hey I'm new to Go syntax. How would I use this function? The part that is throwing me is the pointer at the beginning of the function declaration?

func (p *Pointer) FunctionName(arg string) error {
  dec := json.NewDecoder(strings.NewReader(arg))
  err := dec.Decode(&p)
  return err
}

Answer 1

FunctionName is a method on *Pointer.

If you are asking how to use the code on arbitrary types and not just a *Pointer, then write it as a function:

func FunctionName(v interface{}, arg string) error {
  dec := json.NewDecoder(strings.NewReader(arg))
  err := dec.Decode(v)
  return err
}

Assuming that p is a variable of type *Pointer, then call it like this:

FunctionName(p, "{... JSON text here }")