isicju

-- Best used for learning purposes. Original developer also has an ER diagram available at https://dbseminar.r61.net/node/32
--create tables
BEGIN; 

CREATE TABLE regions
    ( region_id      SERIAL primary key,       
      region_name    VARCHAR(25) 
    );

CREATE TABLE countries 

isicju

version: '2'

services:
   grafana: 
        image: grafana/grafana:latest    
        ports:
         - "3000:3000"
        environment:
         - GF_SECURITY_ADMIN_PASSWORD=admin

isicju

public class Main {
    public static void main(String[] args) throws InterruptedException {
        System.out.println("Works");
    }
}

isicju

Keybase proof

I hereby claim:

• I am isicju on github.
• I am isicju (https://keybase.io/isicju) on keybase.
• I have a public key ASAz-pwHFoER4sn0ciLQpc523lnfe10QRdP3DHww6dC9ugo

To claim this, I am signing this object:

isicju

### Keybase proof

I hereby claim:

  * I am isicju on github.
  * I am isicju (https://keybase.io/isicju) on keybase.
  * I have a public key ASAz-pwHFoER4sn0ciLQpc523lnfe10QRdP3DHww6dC9ugo

To claim this, I am signing this object:

isicju

package com.example.demo.multi;

import java.util.*;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;

isicju

package old.keke;

import org.openjdk.jol.info.GraphLayout;

/*
last optimization - using short mask for booleans
 */
public class FootPrint {

    static final short IS_MALE = 0, IS_EXISTENT_USER = 1, IS_KNOWN_CUSTOMER = 2, IS_BANNED_USER = 3,IS_PREMIUM_USER = 4,

isicju

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.dataformat.xml.XmlMapper;
import com.google.gson.Gson;

import java.util.Arrays;


public class Refactoring {

    final static Converter<Object, String> JSON_CONVERTER = (object) -> {

isicju

import java.util.*;

import static java.lang.Thread.currentThread;

public class Main {
    static class ThreadPool {
        Queue<Runnable> tasks = new LinkedList<>();

        public ThreadPool() {
            Thread mainWorker = new Thread(() -> {

isicju

package com.example.demo.size;

import java.util.UUID;

public class UserCache {
    public static void main(String[] args) {
        User[] cachedUsers = new User[1_000_000];
        for (int i = 0; i < 1_000_000; i++) {
            User tempUser = new User();
            tempUser.id = (long) i;