YanhaoYang

class A
  def hi
    puts 'hi'
  end
end

a = A.new
a.hi
# => "hi"

YanhaoYang

module M1
  def hi
    puts "hi in M1"
  end
end

class A
  include M1

  def ha

YanhaoYang

class A
  def hi
    puts "hi"
  end
end

a = A.new
a.hi
# => hi

YanhaoYang

class A
  def hi
    puts 'hi'
  end
end

a = A.new
a.hi
# => "hi"

YanhaoYang

	done := make(chan struct{})
	defer func(c chan struct{}) {
		select {
		case <-c:
		default:
			close(c)
		}
	}(done)

YanhaoYang

package main

import (
	"fmt"
	"encoding/json"
)

type A struct {
	A string
}

YanhaoYang

// Closable wraps Close() method
type Closable interface {
	Close() error
}

func closeIt(obj Closable) {
	err := obj.Close()
	if err != nil {
		log.Fatal(err)
	}

YanhaoYang

package main

import (
	"fmt"
	"path"
	"runtime"
)

func callerInfo() string {
	function, file, line, _ := runtime.Caller(0)

YanhaoYang

Redirection Rules

Suppose there are two buckets: one-bucket, another-bucket.

Show content in another bucket when the file is missing in one bucket:

  <RoutingRules>
    <RoutingRule>
    <Condition>
      <HttpErrorCodeReturnedEquals>403</HttpErrorCodeReturnedEquals >

YanhaoYang

package main

import (
	"fmt"
	"runtime"
)

func main() {
	m := 1
	s := ""