golang_mastery_struct_vs_object

golang_mastery_struct_vs_object.go

// Copyright 2018 Lukas Lukac <https://lukaslukac.io>; All rights reserved.
// Play: https://play.golang.org/p/FQa09CzdtRh
package main

import (
	"fmt"
)

type illusion struct {
	magicianCount int
}

func (i illusion) increaseMagicianCount() {
	i.magicianCount++
}

func main() {
	myIllusion := illusion{}
	myIllusion.increaseMagicianCount()

	fmt.Println(myIllusion.magicianCount) // Expected: 1, Surprisingly: 0

	// ↟ equivalent to ↡

	myIllusion = illusion{}
	increaseMagicianCount(myIllusion)

	fmt.Println(myIllusion.magicianCount) // Expected: 0, Not surprisingly: 0
}

func increaseMagicianCount(i illusion) {
	i.magicianCount++
}