Yapcheekian

type Model interface {
	comparable
	TableName() (schema, table string)
}

type Change[T Model] struct {
	New T
	Old T
}

Yapcheekian

package mutator

import (
      "encoding/json"
      "log"
      "net/http"
      admission "k8s.io/api/admission/v1"
      corev1 "k8s.io/api/core/v1"
      metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)

Yapcheekian

package authenticate

import (
      "encoding/json"
      "errors"
      "log"
      "net/http"
      "strings"
      authentication "k8s.io/api/authentication/v1beta1"
)

Yapcheekian

package authorize

import (
      "encoding/json"
      "fmt"
      "log"
      "net/http"
      authorization "k8s.io/api/authorization/v1beta1"
)

Yapcheekian

package validate

import (
      "encoding/json"
      "log"
      "net/http"
      "regexp"
      admission "k8s.io/api/admission/v1"
      corev1 "k8s.io/api/core/v1"
      metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"

Yapcheekian

docker run -it --rm k8s.gcr.io/kube-apiserver:v1.19.0 kube-apiserver --help

docker run -it --rm k8s.gcr.io/kube-scheduler:v1.19.0 kube-scheduler --help

Custom Scheduler

apiVersion: v1
kind: Pod

Yapcheekian

https://stackoverflow.com/questions/3324643/processes-threads-green-threads-protothreads-fibers-coroutines-whats-the

https://stackoverflow.com/questions/46864623/which-of-coroutines-goroutines-and-kotlin-coroutines-are-faster

Yapcheekian

var arrNum [5]int // this is an array
var sliceNum []int // this is a slice

fmt.Println(arrNum) // [5]int{0,0,0,0,0} array have initial value of zero value
fmt.Println(sliceNum) // []int(nil) slice have initial value of nil value

sliceNum == nil // true

arrNum[0] = 1 // ok
sliceNum[0] = 1 // compile time error because you cannot assign values to nil

Yapcheekian

#!/usr/bin/env bash
# https://mp.weixin.qq.com/s?__biz=MzA4MzIwNTc4NQ==&mid=2247484821&idx=1&sn=aaa173a8b913cc759c56efe05d2c15ad&chksm=9ffb4e63a88cc7755ca720b3886946245246d8e57687cf209ad47f61a186cc290c04ef57fc91&scene=21#wechat_redirect

function e_net() {
  set -eu
  pod=`kubectl get pod ${pod_name} -n ${namespace} -o template --template='{{range .status.containerStatuses}}{{.containerID}}{{end}}' | sed 's/docker:\/\/\(.*\)$/\1/'`
  pid=`docker inspect -f {{.State.Pid}} $pod`
  echo -e "\033[32m Entering pod netns for ${namespace}/${pod_name} \033[0m\n"
  cmd="nsenter -n -t ${pid}"
  echo -e "\033[32m Execute the command: ${cmd} \033[0m"

Yapcheekian

https://cses.fi/book/book.pdf

https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-042j-mathematics-for-computer-science-fall-2010/video-lectures/

https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-042j-mathematics-for-computer-science-fall-2005/assignments/

https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-006-introduction-to-algorithms-fall-2011/lecture-videos/

https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-046j-design-and-analysis-of-algorithms-spring-2015/lecture-videos/