kwonghung-YIP

// "static void main" must be defined in a public class.
public class Knapsack {
    
    private String[] name;
    private int[] weight;
    private int[] value;
    private int[][] m;
    private int capacity;
    
    public static void main(String[] args) {

kwonghung-YIP

// "static void main" must be defined in a public class.
public class Main {
    public static void main(String[] args) {
        listItem(new String[] {"A","B","C","D","E","F"});
    }
    
    static public void listItem(String[] names) {
        int n = names.length;
        for (int c=0;c<Math.pow(2,n);c++) {
            System.out.print("{");

kwonghung-YIP

import java.nio.charset.StandardCharsets;

import org.eclipse.paho.mqttv5.client.MqttClientPersistence;
import org.eclipse.paho.mqttv5.client.persist.MemoryPersistence;
import org.eclipse.paho.mqttv5.client.MqttAsyncClient;
import org.eclipse.paho.mqttv5.client.MqttConnectionOptions;

import org.eclipse.paho.mqttv5.client.IMqttToken;
import org.eclipse.paho.mqttv5.common.MqttSubscription;
import org.eclipse.paho.mqttv5.client.MqttCallback;

kwonghung-YIP

import { StatusBar } from 'expo-status-bar';
import React from 'react';
import { StyleSheet, Text, View } from 'react-native';

// expo install mqtt
// fix refer to mqtt.js issue: https://github.com/mqttjs/MQTT.js/issues/573
const mqtt = require('mqtt/dist/mqtt')

export default function App() {

kwonghung-YIP

# Inspect the Root CA Cert of your domain, and it as ca.crt 
openssl s_client -connect <host>:<port> -showcerts

# Verify the cert contexnt
openssl x509 -in ca.crt -text

# Create the Java Keystore file (JKS) and import the ca.crt into it 
jdk/bin/keytool -import -file ca.crt -keystore trust.jks -storepass password

# Verify the JKS file

kwonghung-YIP

#!/bin/bash

bkupdir="<your backup folder>/bkup_`date +%Y%m%d_%H%M%S`"
log="$bkupdir/backup.log"

mkdir -p $bkupdir

echo "backup folder : $bkupdir"

echo "Start time    : `date`" >> $log

kwonghung-YIP

#!/bin/bash

bkupdir="bkup_`date +%Y%m%d_%H%M%S`"
restorefile="$bkupdir/restore.sh"
log="$bkupdir/backup.log"

mkdir $bkupdir
echo "#!/bin/bash" > $restorefile
chmod u+x $restorefile

kwonghung-YIP

#!/bin/bash

docker login -u <<registry login>> -p <<password>> <<user registry host>>

docker ps -a --format "{{.ID}} {{.Image}}" | grep <<your registry prefix>> | \
while read line
do
  ctrid=`echo $line | awk '{print $1}'`
  imgtag=`echo $line | awk '{print $2}'`
   

kwonghung-YIP

import React, { useState } from 'react';
import ReactDOM from 'react-dom';
import * as serviceWorker from './serviceWorker';
import { createStore, combineReducers, applyMiddleware } from 'redux';
import { Provider, useSelector, useDispatch } from 'react-redux';

import { Card } from 'react-bootstrap';

import 'bootstrap/dist/css/bootstrap.min.css';
import thunk from 'redux-thunk';

kwonghung-YIP

import React from 'react';
import ReactDOM from 'react-dom';
import * as serviceWorker from './serviceWorker';
import { createStore, combineReducers } from 'redux';
import { Provider, useSelector, useDispatch } from 'react-redux';

const reducer = combineReducers({
  counter: (state = 0, action) => {
    switch (action.type) {
      case "INCR":