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Assign Default Value for Struct Field

Method of assigning a custom default value can be achieve by using constructor function. Instead of creating a struct directly, the Info function can be used to create an Employee struct with a custom default value for the Name and Age field.

Example

package main

import "fmt"

type Employee struct {
	Name string
	Age  int
}

func (obj *Employee) Info() {
	if obj.Name == "" {
		obj.Name = "John Doe"
	}
	if obj.Age == 0 {
		obj.Age = 25
	}
}

func main() {
	emp1 := Employee{Name: "Mr. Fred"}
	emp1.Info()
	fmt.Println(emp1)

	emp2 := Employee{Age: 26}
	emp2.Info()
	fmt.Println(emp2)
}
This is a technique rather than something that is part of the Golang specification.
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