esys

type Node struct {
   Data int
   Left *Node
   Right *Node
}

func NewNode(data int) *Node {
   return &Node{data, nil, nil}
}

esys

func DFRec(n *Node) {
   if n == nil {
      return
   }
   DFRec(n.Left)
   n.Process()
   DFRec(n.Right)
}

esys

func DF(n *Node) {
   s := Stack{}
   current := n
   for {
      if s.IsEmpty() && current == nil { return }
      if current != nil {
         s.Push(current)
         current = current.Left
      } else {
         current, _ = s.Pop()

esys

func main() {
   start := time.Now()

   n := NewNode(1)
   n.Left = NewNode(2)
   n.Right = NewNode(3)
   n.Left.Left = NewNode(4)
   n.Left.Right = NewNode(5)
   n.Right.Left = NewNode(6)
   n.Right.Right = NewNode(7)

esys

var wg sync.WaitGroup

func DFRecImproved(n *Node){
   if n == nil {
      return
   }
   wg.Add(1)
   go DFRecImproved(n.Left)
   n.Process()
   wg.Add(1)

esys

func main() {
   n := NewNode(1)
   n.Left = NewNode(2)
   n.Right = NewNode(3)
   n.Left.Left = NewNode(4)
   n.Left.Right = NewNode(5)
   n.Right.Left = NewNode(6)
   n.Right.Right = NewNode(7)
   n.Right.Right.Left = NewNode(8)

esys

package main

import (
	"fmt"
	"sync"
	"time"
)

var wg sync.WaitGroup

esys

import * as cdk from "@aws-cdk/core";
import * as eks from "@aws-cdk/aws-eks";
import * as ec2 from "@aws-cdk/aws-ec2";
import * as iam from "@aws-cdk/aws-iam";
import { CfnJson } from "@aws-cdk/core";

export class MyCluster extends cdk.Construct {
  constructor(scope: cdk.Construct, id: string) {
    super(scope, id);

esys

enableAutoscaling(cluster: eks.Cluster, ng: eks.Nodegroup, version: string = "v1.17.3") {
    const autoscalerStmt = new iam.PolicyStatement();
    autoscalerStmt.addResources("*");
    autoscalerStmt.addActions(
      "autoscaling:DescribeAutoScalingGroups",
      "autoscaling:DescribeAutoScalingInstances",
      "autoscaling:DescribeLaunchConfigurations",
      "autoscaling:DescribeTags",
      "autoscaling:SetDesiredCapacity",
      "autoscaling:TerminateInstanceInAutoScalingGroup",

esys

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-scale
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template: