Golang Method(方法) & Functions(函數) 差異

Q:

Method vs Functions in Golang, what's difference?

A:

• Method:

1. define the behavior of a type

2. should use state

3. logically connected

   For example:

   type Something struct{
       name string
   }
    
   func (s Something) Name() string {
       return s.name 
   }    
   

• Function:

1. should be stateless

2. can accept interface as input

   For example:

   type Something interface {
       Name() string
   }
    
   func GetName(s Something) string {
       return s.Name()
   }
   

Ref:

• 7 common mistakes in Go and when to avoid them by Steve Francia (Docker)