1055373165 / Golang_SandBox

my sandbox repository to learn golang

Learning Go

Introduction

This is just a sandbox repository for me to put in random programming, mostly for me to learn go. The motivation is that I want to learn a new backend language to be able to write high-performance backend services, and there are many projects (k8s, docker, normad) are written in go. If i understand Go it will be easier for me to understand these projects.

What i like about Go:

• Clear and nice syntax.
• Channel and goroutine is awesome, a lot more cleaner than in python where i have to use Condition for cordination.
• Concurrency is easy to reason. Everything is blocking, unless you let it go.
• Strong-typed
• Fast compilation
• What I don't like about Go:

Single workspace is a confusing.

• Error handling is just awful. It's too bad that Go does not have a try / catch block.
• JSON deserialization is hard if you deal with generic interface
• You tend to write more code due to the verbose syntax of Go
• Lacking of Generic (coming soon)

I/O

• Use bytes.Buffer for string writer
• Use strings.Reader for string reader

Channels

It’s okie to leave channel open. GC will collect it

• http://www.tapirgames.com/blog/golang-channel-closing

Ser/der

• Gobs of data
• Handling interace{} decoding with Gob
• Go codec series

Slices

• Go slice is passed as reference.
• Use copy() to copy slice
• Use []byte(str) to convert string to byte array.
• Use string(bytes) to convert byte to string.
• Remove an item in slice
• Use reflect.DeepEqual to compare two slices

Links

• https://rakyll.org/style-packages
• https://blog.golang.org/package-names
• appliedgo.net Go by examples: Errors Traps, Gotchas, and Common Mistakes for New Golang Devs