Geoff Hayward GeoffHayward

## Generic
private Object[] getColumn(int address, Object[][] from) {
    return Arrays.stream(from).map(x -> x[address]).toArray(Object[]::new);
}

private <T> T[] getColumn(int address, T[][] from) {
    return (T[]) Arrays.stream(from).map(x -> x[address]).toArray(Object[]::new);
}

## Setting up MySQL on Ubuntu 18.04
sudo apt update
sudo apt install mysql-server
sudo mysql_secure_installation

This seems to lock it down to the Ubuntu root user, therefore login using the Ubuntu root user
 and run the following.

 sudo mysql -u root
 DROP USER 'root'@'%';
 CREATE USER 'root'@'localhost' IDENTIFIED BY '';

## HA Proxy (change a part of a URL)
http-request redirect code 301 location https://%[hdr(host)]%[url,regsub(^/example/,/demo/,)] if { path_beg /example/ }

## Add permission to host shared folders
sudo usermod -aG vboxsf $(whoami)
reboot

## .ebextensions iptables.config
commands:
  create_post_dir:
    command: "mkdir /opt/elasticbeanstalk/hooks/appdeploy/post"
    ignoreErrors: true
files:
  "/opt/elasticbeanstalk/hooks/appdeploy/post/99_update_iptables.sh":
    mode: "000755"
    owner: root
    group: root
    content: |

## App.java
public class App {

  public static void main(String[] args){
    Pizza nypizza = new NyPizza
                              .Builder(NyPizza.Size.LARGE)
                              .addTopping(Pizza.Topping.HAM)
                              .addTopping(Pizza.Topping.ONION)
                              .addTopping(Pizza.Topping.PEPPER)
                              .build();
    System.out.println(nypizza.toString());

## App.java
public class App{

  public static void main(String[] args){
    Thing t = new Thing.Builder("a", "b", "c").prop5("e").prop4("d").build();
    System.out.println(t.getProps());
  }

}

## OutputStream.java
public final class OutputStream{

    public static String capture(Consumer consumer){
        PrintStream old = System.out;
        try {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            PrintStream ps = new PrintStream(baos);
            System.setOut(ps);
            consumer.accept(consumer);
            return baos.toString();

## Main.java
import java.util.ArrayList;
import java.util.List;

public class Main {

    public static void main(String[] args) {
        List<ThingSubscriber> subscribers = new ArrayList<>();
        subscribers.add(new ThingSubscriber("Subscriber 1"));
        subscribers.add(new ThingSubscriber("Subscriber 2"));

## pom.xml
<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-assembly-plugin</artifactId>
    <version>2.4</version>
    <configuration>
        <archive>
            <manifest>
                <mainClass>eu.geoffhayward.application.Main</mainClass>
            </manifest>
        </archive>