Why I chose golang

  • Golang is open-source and backed up by a large corporation
  • Golang syntax is simple
  • Good cross platform support
  • It is a compiled language
  • Compiles into a single binary, therefore can install anywhere without installing any dependencies.
  • Static type system. Tells you about type mistakes on compiling
  • Performs better than python [source]
  • Go has garbage collection (whatever that means)
  • Go has a concurrency model (whatever that means)
  • Go is more elegant than C++
  • Compile errors are more readable than other languages

Tips & tricks

  • go build -ldflags "-w -s" makes the executable smaller
  • go get -u golang.org/x/lint/golint for linting go code
  • For encoding, encoding/json and encoding/xml
  • go build -pie introduces ASLR.


go func(a int){
} (x)

Port scanner

conn, err := net.Dial("tcp", "scanme.nmap.org:80")
if err != nil {
	fmt.Printf("Connection failed on port 80")



// creates the struct
var wg sync.WaitGroup 

for {
	// +1 to the counter

	go func(j int){
		// at the end of the func, -1
		defer wg.Done()
	} (a)

// waits for the counter to be 0

Worker functions

func worker(ports chan int, wg *sync.WaitGroup){
	for p := range ports {

Buffered channel

ch := make(chan int, 100)


value := 21

address = &value

fmt.Println(*address) // = 21
  • (*p).field is the same as p.field
  • v.Scale(5) is the same as (&v).Scale(5)

Find issues

golint and go vet