Golang React JS Technology Blog

Constructors in Golang

There are no default constructors in Go, but you can declare methods for any type. You could make it a habit to declare a method called "Init". Not sure if how this relates to best practices, but it helps keep names short without loosing clarity.

Example

package main

import "fmt"

type Employee struct {
    Name string
    Age int
}

func (e *Employee) Init(name string, age int) {
    e.Name = name
    e.Age = age
}

func info(name string, age int) *Employee {
    e := new(Employee)
    e.Name = name
    e.Age = age   
    return e
}

func main() {
    emp := new(Employee)
    emp.Init("John Doe",25)
    fmt.Printf("%s: %d\n", emp.Name, emp.Age)
	
	empInfo := info("John Doe",25)
	fmt.Printf("%v",empInfo)
}

Output

John Doe: 25
&{John Doe 25}
Most Helpful This Week
Convert Float32 to Float64 and Float64 to Float32 How to check if a map contains a key in Go? Regular expression to extract text between square brackets Subtract N number of Year, Month, Day, Hour, Minute, Second, Millisecond, Microsecond and Nanosecond to current date-time. Regular expression for matching HH:MM time format in Golang How to find out element position in slice?