Golang Struct - Getting Started with Golang
In this Getting Started with Golang, we will learn how to use the Golang Structs which is the collection of fields that can hold multiple field types, exportable or non-exportable struct fields or even the struct name by itself in Golang programming language with step by step guide.
#MaharlikansCode
#GolangStructs
#Golang
#LifeAsSoftwareDeveloper
#Maharlikans
#FilipinoSoftwareDeveloper
If you go with extra mile for buying me a cup of coffee, I appreciate it guys: https://ko-fi.com/maharlikanscode
Source Codes:
package main
import (
"errors"
"fmt"
"strings"
)
// Person is the collections of personal information
type Person struct {
FirstName, LastName string
Age int // Age is the person's age
UserEmail Email
}
// Email is the collection of user's email information
type Email struct {
Name, Address string
}
func main() {
p := &Person{
FirstName: "John",
LastName: "Doe",
Age: 25,
UserEmail: Email{"John Doe", "[email protected]"},
}
fmt.Println("FirstName: ", p.FirstName)
fmt.Println("UserEmail: ", p.UserEmail.Address)
np, err := newPerson("Jose", "Rambo", 17, Email{"Jose Rambo", "[email protected]"})
if err != nil {
fmt.Println("Oops!, got some error: ", err)
return
}
fmt.Println("first name from newPerson: ", np.FirstName)
}
func newPerson(firstName, lastName string, age int, em Email) (*Person, error) {
if len(strings.TrimSpace(firstName)) == 0 {
return &Person{}, errors.New("Please enter your first name")
}
if len(strings.TrimSpace(lastName)) == 0 {
return &Person{}, errors.New("Please enter your last name")
}
if age less than or equal to 18 {
return &Person{}, errors.New("You must be at least 18 years old to keep your record")
}
return &Person{
FirstName: firstName,
LastName: lastName,
Age: age,
UserEmail: em,
}, nil
}
