javagrails

Necessary Bash Commands

Uninstall any package with Bash command from terminal here example with [ nginx ].

$ sudo apt-get remove nginx
$ sudo apt-get autoremove
$ sudo apt-get autoclean
$ sudo apt-get remove --purge nginx 

javagrails

Scenerio

public class Student {
private int id;
private String name;
private List<State> states = new ArrayList<>();
}

public class State {
    private int id;

private String name;

javagrails

---------------------- postgresql.yml ----------------------
version: '2'
services:
  yourProjectName-pg:
    image: postgres:9.6-alpine
    volumes:
      - ~/dockerdata/yourProjectName/postgresql/:/var/lib/postgresql/data/
    environment:
      - POSTGRES_USER=openuser
      - POSTGRES_PASSWORD=openpass

javagrails

https://bigwisdom.net/solr-tutorial-learn-solr-in-2-hours/

========================== Solr Basic Data Types for Index =============================
Data Type               |Index_Suffix    |Example
----------------------------------------------------------------------
String	                _s	            id:"1051",
String	                _s	            url_s:"https://javagrails.wordpress.com/",
String	                _s	            title_s:"MackBookProkk",
String	                _s	            description_s:"dmlasd",
String	                _s	            duration_s:"dasdsad",

javagrails

===== ## ubuntu OS Information =====
sudo lsb_release -a

===== ## build essential for ubuntu =====
sudo apt-get install -y build-essential
sudo apt-get install libpng-dev libjpeg-dev -y
sudo apt-get install pngquant -y
sudo apt-get install unrar -y

javagrails

Docker Helps

Docker is a tool which helps developers build and ship high quality applications, faster, anywhere.

Why Docker

With Docker, developers can build any app in any language using any toolchain. Dockerized apps are completely portable and can run anywhere.

Developers can get going by just spinning any container out of list on Docker Hub. Docker manages and tracks changes and dependencies, making it easier for sysadmins to understand how the apps that developers build work. And with Docker Hub, developers can automate their build pipeline and share artifacts with collaborators through public or private repositories.

javagrails

whereis yarn
yarn -v

sudo apt-get remove yarn && sudo apt-get purge yarn

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
sudo apt-get update && sudo apt-get install yarn -y

javagrails

import java.util.Date;
import java.text.ParseException;
import java.text.SimpleDateFormat;

/**
 * <b>DateStringFormatter</b>
 *
 * @author Salman
 * Url https://github.com/javagrails
 * @ since Created by Salman on 3/22/2016.

javagrails

How to Setup a Local Static File Server in Windows by XAMPP

M.M. Saleh (Salman) - https://github.com/javagrails  

total.bk - it may be a file server

1. create a folder for server root path in location [ D:\zfileserver ]

2. Go to the path [D:\xampp\apache\conf\extra]
Open the file [ httpd-vhosts.conf ]

javagrails

public class JavaIntegerBehave  {
  
  public static void main(String[] args) {
	  Integer i= new Integer(10);
  	Integer j= new Integer(10);
  	System.out.println("R1: "+(i==j));   // false
  	    
  	    
  	Integer k= 10;//new Integer(10);
  	Integer l = 10;//new Integer(10);