Gopythor

통상적으로 변수 등이 String으로 사용된다면 큰 차이는 없음. 그러나 String이 아닌 형태가 서로 결합한다면 문제가 발생함. Code func main() { sstring := fmt.Sprint("Hello ", "World") nstring := "Hello World" fmt.Println(sstring) fmt.Println(nstring) }https://go.dev/play/p/WO415NpCkSl 문제는 String이 아닌 Integer 등이 혼합될 때이다. Code func main() { Sequence := 254 sstring := fmt.Sprintf("Sequence number %d is on hold", Sequence) fmt.Println(sstring) nstri..

Go/Study record 2022. 3. 26. 20:21

QuickSort Divide and conquer algorithm After determining the pivot, the position of the pivot is confirmed and aligned Quicksort has many variations based on pivot. When comparing numbers, the pivot is the standard. The speed varies depending on the position of the pivot. There are left pivot, right pivot, middle pivot, and random pivot. O(n²) in the worst case Range, Criteria, Compare, Swap qui..

Go/Study record 2022. 3. 17. 18:44

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

What is the Builder Pattern? Creational pattern Build complicated objects piect by piece So what is the builder pattern? It is considered a creational pattern like the factory pattern. However it differs when it comes to how it builds an object. The builder pattern is used to create an object by putting its pieces together first before instaniating it. The pattern relies on a builder object whic..

Go/Study record 2022. 2. 27. 21:32