Learning Functional Programming in Go

Int base class

The Equals method of Int will check whether other types are equal, using whatever logic we deem appropriate:

type Int intfunc (i Int) Equals(e Equals) bool {   intVal := int(i)   switch x := e.(type) {   case Int:      return intVal == int(x)   case String:      convertedInt, err := strconv.Atoi(string(x))      if err != nil {         return false      }      return intVal == convertedInt   default:      return false   }}