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12 Best Practices Every Golang Developer Must Follow

This blog is aimed to act as a practical guide of
to implement the Go best practices and design patterns which could help the developers achieve the greater results. You must have already seen in the Go Tutorial and Effective Go.
But to brief you more, planning to discuss more about the all best Go practices along with the detailed samples.

These are the Go best practices or techniques that has consistently shown results for superior those achieved great results

Listing down the few of best techniques to write Go code that is simple, readable, Maintainable.

Use gofmt

Run gofmt on your code to automatically fix the majority of mechanical style issues. Almost all Go coders in the world uses gofmt.
gofmt will read the go program and it will show you the properly aligned output after indentation, vertical alignment and even it can re-format the comments too.

Commands and options

gofmt filename – This will print re-formatted code.
gofmt -w filename – This will reformat the code and updates the file.
gofmt -r ‘rule’ filename – Apply the rewrite rule to the source before reformatting.
gofmt /path/to/ package – This will format the whole package.

Here is a small example for gofmt

filename: demo.go

 

Passing a Command: $ gofmt demo.go

Output:

 

Avoid Nesting By Handling Errors First

Instead of giving multiple or nested conditions, We can break the condition if we ought to face error while processing and proceed further with coding.

 

Instead you can do like this:

 

// proceed to further
Less nesting means less cognitive load on the reader.
If the if statement has an initialization statement such as:

 

then this may require to define the short variable declaration in the code:

 

Error Strings

Error strings should not be capitalized (unless beginning with proper nouns or acronyms).

For Example:

Instead of thics command fmt.Errorf(“Something went wrong”) we can move with this fmt.Errorf(“something went wrong”)

Handling Errors

Do not discard errors using _ variables. If a function returns an error, check to make sure whether the function succeeded or not. Better, Handle the error and return it or that will rise as a panic error when any exceptional situation occurs.

Don’t use panic errors

Don’t use panic for normal error handling. In that case you can use error and multiple return values.

Avoid Repetition When Possible

suppose if you want use structures in controllers, as well as models, Create one common file and there you can create the structures.

Variable Name Declaration

Variable names in Go should be short rather than long. This is especially true for local variables with limited scope.

Prefer c to lineCount
Prefer i to sliceIndex

 

Type Switch To Handle Special Cases

Suppose if you’re not sure about what the interface{} type could be, you can use a type switch:

For Example:

 

Related:

Type Switch With The Short Variable Declaration

Declare a variable and it will have the type of each case:
For Example:

 

Important Code Goes First

If you have the importannt information like License information, build tags, package documentation then describe it earlier.
We can separate the Import statements, related groups by blank lines.
The standard library packages are in the first group.

 

The rest of the code starting with the most significant types and ending
with helper function and types.

Import Dot

The import . form can be used to test the circular dependencies. And, it cannot be made part of the package being tested:

 

In this case, the test file cannot be in package foo because it uses bar/testutil, which imports foo. So we use the import . form to let the file pretend to be part of the package for even though it is not. Except for this one case, do not use import . in your programs. It makes the programs much harder to read because it is unclear when a name like Quux is a top-level identifier in the current package or in an imported package.

Related:

Document Your Code

Package name, with the associated documentation before.
// Package playground registers an HTTP handler at “/compile” that
// proxies requests to the golang.org playground service.
package playground
Exported identifiers appear in godoc, and they should be documented correctly.

 

Comment Sentences

Comments documenting declarations should be full sentences, even if that seems a little redundant. This approach makes them to format well when extracted into godoc documentation. Comments should begin with the name of the thing being described and end in a period:

 

Hope these Go best practices will help you to improve the quality of your code. We have listed out some more best practices in various technologies which can be found in our largest blog repository. For more inquires reach us at info@agiratech.com

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Reddy Sai

Young Senior Software Developer having 3+years of experience in Web development, skilled in Golang, Ruby, AngularJS, Ruby on Rails & NodeJS. With a handful of skills, he keeps thriving through all the Edge of Web development to become a perfect back end developer. Besides, this young techie will always buzz up & surprise us with his beautiful Movie collections.

One thought on “12 Best Practices Every Golang Developer Must Follow”

  1. Very cool and precise article!

    In the bold sentence: ” These are the Go best practices or techniques that has consistently shown results for superior those achieved great results ”

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