Gopythor

#3.7 Structs with Pointers package person type person struct { name string age int } person 폴더에 person.go를 만든다. 그리고 nico를 main function에서 만든다 person struct가 소문자이면 export가 불가능하다. 대문자로 고쳐야 한다. variable, function, type 등 대문자로 시작하면 그 말은 export가 되었다는 뜻이고 다른 패키지에서 사용가능. package person type Person struct { name string age int } nodejs에서는 export default를 해야하지만 go에서는 대문자로만 하면 자동적으로 export 된다. package mai..

Go/Blockchain 2022. 7. 11. 03:27

#3.6 Structs Struct를 배우면 포인터를 이해하기 쉬워진다. Go에서 struct는 class와 가장 비슷하다. package main type person struct { name string age int } func main() { nico := person{name : "nico", age: 12} // 순서대로 person{"nico",12}도 가능 } person struct는 string인 name과 int인 age를 갖게 된다. label 없이 순서대로 적어도 되고, label을 붙여도 된다. struct의 순서만 기억하고 있으면 된다. struct의 장점은 receiver 함수이다. Go 에서의 method 같은 것이다. receiver 함수는 기본적으로 method와 닮았다..

Go/Blockchain 2022. 7. 11. 00:00

Introduction Reflection and structs Reflection and struct tags Reflections and interfaces In the previous, we took a big step in understanding how reflection works in the Go language. Now we will dive deeper into the topic by covering how to use reflection with structs and interfaces. In this lecture, we will start by explaining how reflection needs structs And then we'll explore struct tags..

Go/Mastering Go 2022. 4. 11. 03:21

Code package main import "fmt" type Person struct { Address string PostCode string JobType string Company string } type PersonBuilder struct { person *Person } func NewPersonBuilder() *PersonBuilder { return &PersonBuilder{&Person{}} } func main() { pb := NewPersonBuilder() //&{0xc0000b6040} pd := &Person{"a", "b", "c", "d"} //&{a b c d} fmt.Println(pb, pd) }Result &{0xc0000b6040} &{a b c d} pb ..

Go/Study record 2022. 3. 1. 01:02

I was studying that is-a relationship about embeding. But example was not working below refer. refer : https://up-to-date-items.tistory.com/114 package main import "fmt" type Player struct { salary int } type Pro struct { Player bonus int } func (p Player) getSalary() int { return p.salary } func main() { player1 := Player{salary: 100} proPlayer := Pro{Player{salary: 120}, bonus: 30} fmt.Println..

Go/Study record 2022. 2. 28. 17:46

Factory Pattern Creational pattern The caller does not create objects directly The factory function or object handles the creation of new objects based on some conditions So what is the factory pattern? It belongs to a pattern type called creational pattern. This is because the factory pattern is mostly targeted towards creating object. In the factory pattern, the code that uses the object is no..

Go/Mastering Go 2022. 2. 24. 22:50