Embedded fields in structs

main.go

	package main

	import (
	"fmt"
	)

	typeFruitstruct {
	Namestring
	Colorstring
	}

	// You can define functions on either the "base" ...
	func (f*Fruit) Announce() {
	fmt.Printf("I am %s, and I am %s\n", f.Color, f.Name)
	}

	// Here adding "Fruit" is called embedding fields, and I've also seen "promoted fields" because they come from Fruit
	typeAvocadostruct {
	Fruit
	IsRipebool
	}

	// And we can define functions on the struct with embedded fields
	// We cannot reference fields / methods for one of these classes on a parent.
	// E.g., Fruit could not have a function that uses IsRipe (although it would be appropriate huh?)
	func (a*Avocado) IsReady() {
	ifa.IsRipe {
	fmt.Printf("I am %s, and I am %s, and I am ripe!\n", a.Color, a.Name)
	} else {
	fmt.Printf("I am %s, and I am %s, and I am NOT ripe!\n", a.Color, a.Name)
	}

	}

	funcmain() {
	// This does not work!
	// avocado := Avocado{Name: "Harry the avocado", Color: "green", IsRipe: true}
	// ./main.go:19:21: cannot use promoted field Fruit.Name in struct literal of type Avocado
	// ./main.go:19:48: cannot use promoted field Fruit.Color in struct literal of type Avocado

	// Instead, pass the "base" type to the underlying type
	avocado:=Avocado{Fruit: Fruit{Name: "Harry the avocado", Color: "green"}, IsRipe: true}

	// This function is on the base struct
	avocado.Announce()
	// I am green, and I am Harry the avocado

	// This function
	avocado.IsReady()
	// I am green, and I am Harry the avocado, and I am ripe!

	// There is a proposal to make this easier!
	// https://github.com/golang/go/issues/9859
	}

	#!/usr/bin/env python3

	classFruit:
	def__init__(self, name, color):
	self.name=name
	self.color=color

	defAnnounce(self):
	print(f"I am {self.color}, and I am {self.name}")


	classAvocado(Fruit):

	def__init__(self, name, color, is_ripe):
	super().__init__(name, color)
	self.is_ripe=is_ripe

	defIsReady(self):
	ifself.is_ripe:
	print(f"I am {self.color}, and I am {self.name}, and I am ripe!")
	else:
	print(f"I am {self.color}, and I am {self.name}, and I am NOT ripe!")

	defmain():

	avocado=Avocado(name="Harry the avocado", color="green", is_ripe=True)
	avocado.Announce()
	# I am green, and I am Harry the avocado

	avocado.IsReady()
	# I am green, and I am Harry the avocado, and I am ripe!

	if__name__=="__main__":
	main()