Errors Handlings

Unlike almost all over the internet coaching you to use errors package for creating error object without reading through the specification available here: https://golang.org/pkg/errors/#New, I will use a different recipe for it. In this case, lesser package imports.

Standard Conventional Way

Now, the standard way recommended by many gopher is to use errors.New function to create the error object. This is good if you're not doing any formatting to the error message and also a faster way to create one. The disadvantage however, is that you import an entirely new error package.

Here's an example shown in the specification, that needs both errors package and fmt package:

package main

import (

        "errors"

        "fmt"

)

func main() {

        err := errors.New("emit macho dwarf: elf header corrupted")

        if err != nil {

                fmt.Print(err)

        }

}

Notice that the author needs to import both fmt package and error package to fully manage the error object? That's 2 packages in total.

Current Best Recipe

Now, if you see the second example, you will realize fmt package actually allows you to create error object without needing the error package: the fmt.Errof function. This allows you to handle all error object handling in one package. Here's the example from the specification:

package main

import (

        "fmt"

)

func main() {

        const name, id = "bimmler", 17

        err := fmt.Errorf("user %q (id %d) not found", name, id)

        if err != nil {

                fmt.Print(err)

        }

}

Therefore, I wouldn't need to import errors package anymore just to manage error objects.

That's all about errors handling in Go. End of Lesson. Use the navigation bar to find the next recipe.