linnykoleh

#!/bin/sh

git filter-branch --env-filter '

OLD_NAME="Admin"
CORRECT_NAME="LinnykOleh"
CORRECT_EMAIL="linnik.oleg.93@gmail.com"

if [ "$GIT_COMMITTER_NAME" = "$OLD_NAME" ]
then

linnykoleh

A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

OP: @leonardofed founder @ plainflow.

---

linnykoleh

mvn clean install '-P!CommercialDBJars,!MediumTests'

linnykoleh

Free O'Reilly books and convenient script to just download them.

Thanks /u/FallenAege/ and /u/ShPavel/ from this Reddit post

How to use:

1. Take the download.sh file and put it into a directory where you want the files to be saved.
2. cd into the directory and make sure that it has executable permissions (chmod +x download.sh should do it)
3. Run ./download.sh and wee there it goes. Also if you do not want all the files, just simply comment the ones you do not want.

linnykoleh

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete containers

docker ps
docker ps -a

docker rm $(docker ps -a -q)

linnykoleh

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true">
    <appender name="consoleAppender" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <charset>UTF-8</charset>
            <Pattern>%d %-4relative [%thread] %-5level %logger{35} - %msg%n</Pattern>
        </encoder>
    </appender>

    <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">

linnykoleh

public class ThreadSafeSingleton {

	private static ThreadSafeSingleton instance;

	private ThreadSafeSingleton(){

	}

	public static synchronized ThreadSafeSingleton getInstance(){
		if(instance == null){

linnykoleh

public class StaticSingleton {

	private static StaticSingleton instance = new StaticSingleton();

	private StaticSingleton(){

	}

	public static StaticSingleton getInstance(){
		return instance;

linnykoleh

public class LazySingleton {

	private static LazySingleton instance;

	private LazySingleton(){

	}

	public static LazySingleton getInstance(){
		if(instance == null){

linnykoleh

public V get(Object key) {
		Entry<K, V> entry = getEntry(key);
		return (entry == null ? null : entry.value);
	}

	private Entry<K, V> getEntry(Object key) {
		if (comparator != null) {
			return getEntryUsingComparator(key);
		}
		if (key == null) {