Go!

Learning GO!

awesome-go:

[ ] Writing, building, installing, and testing Go code

[ ] A Tour of Go (Youtube)

[ ] A Tour of Go

[ ] Vim-go

[ ] Build Web Apps with Go Language (golang)

Getting going with Go!

Install :

• ubuntu: install go
  • Go Version Manager
  • Go Tour go1.4

install :

  vagrant up; vagrant ssh

  curl -O https://storage.googleapis.com/golang/go1.6.linux-amd64.tar.gz
  sha256sum go1.6.linux-amd64.tar.gz
  tar xvf go1.6.linux-amd64.tar.gz
  sudo chown -R root:root ./go
  export GOROOT=$HOME/go
  export GOPATH=$HOME/work
  export PATH=$PATH:$GOROOT/bin:$GOPATH/bin

hello world :

  ┌──(~) n(vagrant)──────────────────────────────────(✔)─
  └──➤ mkdir $HOME/work
  ┌──(~) n(vagrant)──────────────────────────────────(✔)─
  └──➤  mkdir -p work/src/github.com/joshmccall221/hello
  ┌──(~) n(vagrant)──────────────────────────────────(✔)─
  └──➤  cat ~/work/src/github.com/joshmccall221/hello/hello.go        
  package main

  import "fmt"

  func main() {
          fmt.Printf("hello, world\n")
  }
  ┌──(~) n(vagrant)──────────────────────────────────(✔)─
  └──➤ go install github.com/joshmccall221/hello  
  ┌──(~) n(vagrant)──────────────────────────────────(✔)─
  └──➤ hello
  hello, world
  ┌──(~) n(vagrant)──────────────────────────────────(✔)─
  └──➤ which hello
  /home/vagrant/work/bin/hello

hello world (unicode) :

  ┌──(~) n(vagrant)──────────────────────────────────(✔)─
  └──➤ cat ~/work/src/github.com/joshmccall221/hello_jap/hello_jap.go 

  package main

  import "fmt"

  func main() {
          fmt.Println("Hello, 世界")
          }

  ┌──(~) n(vagrant)──────────────────────────────────(✔)─
  └──➤ go install github.com/joshmccall221/hello_jap
  ┌──(~) n(vagrant)──────────────────────────────────(✔)─
  └──➤ hello_jap 
  Hello, 世界世

Reverse :

  ┌──(~) n(vagrant)───────────────────────────────────(✔)─
  └──➤ cat work/src/github.com/joshmccall221/string/string.go 
  package string

  func Reverse(s string) string {
    b := []byte(s)
    for i :=0; i < len(b)/2; i++ {
      j := len(b)-i-1
      b[i], b[j] = b[j], b[i]
    }
    return string(b)
  }
  ┌──(~) n(vagrant)───────────────────────────────────(✘)─
  └──➤ go install github.com/joshmccall221/hello
  ┌──(~) n(vagrant)───────────────────────────────────(✔)─
  └──➤ hello

  dlrow ,olleh