Go

A simple, fast, and concurrent language developed by Google.

When to Use

• Microservices / Cloud-native apps
• Network tools (servers, proxies)
• High-performance systems
• CLIs

Quick Start

package main

import "fmt"

func main() {
    fmt.Println("Hello, World!")

    ch := make(chan string)
    go func() {
        ch <- "from goroutine"
    }()

    msg := <-ch
    fmt.Println(msg)
}

Core Concepts

Goroutines

Lightweight threads managed by the Go runtime.

go doSomething()

Channels

Typed conduits for communication between goroutines.

Interfaces

Implicitly implemented. If a struct has the methods, it implements the interface.

Best Practices

Do:

• Handle errors explicitly (check if err != nil)
• Use gofmt to format code
• Keep extensive comments for public APIs
• Use context for cancellation and timeouts

Don’t:

• Ignore errors (using _) blindly
• Use panic/recover for normal error handling
• Create large interfaces (keep them small)

References

• Go Documentation
• Effective Go