victormwenda

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

victormwenda

<?php

namespace app\controllers;

use yii\web\Controller;

class DocPreviewController extends Controller
{
    public function actionPreview($path)
    {

victormwenda

import javax.crypto.*;
import javax.crypto.spec.*;
import java.security.*;

/**
 * Decrypt passwords stored in Oracle SQL Developer.
 * This is intended for password recovery.
 *
 * Passwords are stored in ~/.sqldeveloper/system2.1.1.64.39/o.jdeveloper.db.connection.11.1.1.2.36.55.30/connections.xml
 */

victormwenda

The C++ Programming Language Bjarne Stroustrup, 3rd edition

Chapter 1 - Notes to the reader

When you program, you create a concrete representation of the ideas in your solution to some problem. Let the structure of the program reflect those ideas as directly as possible:

1. If you can think of "it" as a separate idea, make it a class.
2. If you can think of "it" as a separate entity, make it an object of some class.
3. If two classes have a common interface, make that interface an abstract class.

victormwenda

Activate MS Office 2019/2016 for macOS - Microsoft_Office_2019_VL_Serializer

Office 2019 above

2019-06-03

Note that Office2019 DO NOT support activate via simple copy/paste plist license file which is the simplest way to activate Office 2016. Fortunately, you can also use the VL Serializer tool, just install Office 2019 and Serializer, then run Serializer to activate.

Ref

victormwenda

# Ubuntu 18.04 and various Docker images such as openjdk:9-jdk throw exceptions when
# Java applications use SSL and HTTPS, because Java 9 changed a file format, if you
# create that file from scratch, like Debian / Ubuntu do.
#
# Before applying, run your application with the Java command line parameter
#  java -Djavax.net.ssl.trustStorePassword=changeit ...
# to verify that this workaround is relevant to your particular issue.
#
# The parameter by itself can be used as a workaround, as well.