Golang snippets

main.go

package main

import "io"

func main() {

}

// Storager - interface, naming recommendation is to have 'er' ending 
type Storager interface {
  DoSave(v []byte) error
}

// NewStorage - constructor for the struct. Return type is interface so it's also a compile time check that your struct fits to the interface
func NewStorage(opts: StorageOpts) Storager {
  return &storage{opts: opts}
}

// StorageOpts - struct with options for the constructor
type StorageOpts struct {
  address string
}

// storage - it's our class actually. In this case it's private
type storage struct {
  opts StorageOpts
}

// DoSave - fit 'storage' to the Storager interface
func (s *storage) DoSave(v []byte) error {
  // bla bla
  return nil
}

// Close - fit 'storage' to the io.Closer interface
func (s *storage) Close() {
  
}


// this construction ensures on compile-time that your struct implements some interface
var _ Storager = (*storage)(nil)
var _ io.Closer = (*storage)(nil)