kana-ph

class Employee {
  String name;

  abstract double computeSalary();
}

class Regular extends Employee {
  double workHours;
  double hourlyRate;

kana-ph

UI Class

private Panel displayPanel; // assuming: setup complete

public void showMeals() {
	List<Meal> meals = fetchAllMeals();
	
	for (Meal meal : meals) {
		JButton mealButton = createMealButton(meal);

kana-ph

broker 1

<broker ... brokerName="broker" ...>
    ...
    <persistenceAdapter>
        <replicatedLevelDB
            directory="${activemq.data}/leveldb"
            replicas="3"
            bind="tcp://0.0.0.0:0"
            zkAddress="hostname1:2181,hostname2:2181,hostname3:2181"

kana-ph

Image grabbed from ElasticCloudApps.com

Ingredients

• 3 Linux machines with Installed JDK 1.7+
  • Default setup is 3 Replicas
• Apache ActiveMQ 5.13.4 (stable)
  • Extract to /opt/activemq/apache-activemq-5.13.4 (We call this ACTIVEMQ_HOME from now on)
• Apache Zookeeper 3.4.8 (stable)

kana-ph

void square(int i) { i ** 2 }

def rng = new Random()

List numbers = (1..10000000).collect { rng.nextInt(11) }
long start, end

start = System.currentTimeMillis()

numbers.each(this.&square)

kana-ph

#!/bin/sh

dnf groupinstall -y gnome
systemctl enable gdm
shutdown -r now

kana-ph

#!/bin/sh

for db_name in "$@"
do
	echo " * Current DB: $db_name"
	psql --host=localhost --user=postgres -c "DROP DATABASE $db_name;"
	psql --host=localhost --user=postgres -c "CREATE DATABASE $db_name;"
done

kana-ph

Installing postgresql

Fedora, RHEL, CentOS, or similar OS

# yum install postgresql
# yum install postgresql-server

Debian, Ubuntu, Mint, or similar OS

kana-ph

#!/bin/sh

byte=$(head -c 1 /dev/random | cat);
flip=$(printf '%d\n' "'$byte'");

if [ $((flip % 2)) -eq 0 ];
then
	echo 'HEADS'
else
	echo 'TAILS'

kana-ph

//javascript:
var r=0;

var x = [0.1, 0.25, 1.6, 300, 300];
var y = [0.05, 0.24, 0.24, 200, 200];

var imgs = document.getElementsByTagName("img");

setInterval(function A() {
	for(i=0; i-imgs.length; i++){