MT4 / Metatrader 4 for MacOS is draining battery

hi guys for Metatrader 4 user on MacOS be aware that after the program exit we need to force quit a process called “wine32on64-preloader”.

This is because the process will exist and use your cpu all the time and drain the battery even after MT4 exit.

Rails 7 on Jruby

Step to do :

  1. Install Jruby
  2. run jruby -S gem install rails
  3. run jruby -S rails new App
  4. Step 3 will fail miserably related to bindex gem.
  5. Open Gemfile and comment out web-console gem.
  6. Go to your App folder and run jruby -S bundle install
  7. run jruby -S rails server
  8. Browse localhost:3000 to view rails welcome page.

MD5 hash on modern java

To get a similar php md5 or postgresql md5 function on java then try this code.


public class Md5Util {

public static String byteArrayToHex(byte[] a) {
       StringBuilder sb = new StringBuilder(a.length * 2);
       for(byte b: a)
          sb.append(String.format("%02x", b));
       return sb.toString();

public static String Hash(String input) throws NoSuchAlgorithmException {

    MessageDigest md = MessageDigest.getInstance("MD5");
    byte[] digest = md.digest();
    return byteArrayToHex(digest);