Introduction

Since I first started using AngularJS several years ago, it has become the most popular single-page application (SPA) framework for the JavaScript language. AngularJS makes it easy to solve simple problems fast, yet has enough features to enable development teams to build complex large-scale applications.

This tutorial aims to introduce a complete beginner to AngularJS by explaining fundamental concepts and building a sample application. The application will be a simplified admin area for a multi-author blog.

Angular 2 is currently still in Alpha/Developer Preview, but the main functionality and the core documentation are both already available. Let’s gather here what is so far known about the design goals of Angular 2, and how they are planned to be implemented:

• Mains goals of Angular 2
• Simpler to reason about
• Angular 1 vs Angular 2 change detection
• More transparent internals with Zones
• Improved stack traces
• Much improved performance (and why)
• Improved modularity
• Improved Dependency injection
• Web component friendly (how and why)
• Support for Shadow DOM
• Support for native mobile rendering in Android and iOs
• Support for server side rendering
• Improved testability
• Migration path to Angular 2
• Conclusions

Prepared statement types

While researching for the Statement Caching chapter in my High-Performance Java Persistence book, I got the chance to compare how Oracle, SQL Server, PostgreSQL and MySQL handle prepare statements.

Thanks to Jess Balint (MySQL JDBC driver contributor), who gave a wonderful answer on StackOverflow, I managed to get a better understanding of how MySQL handles prepared statements from a database performance point of view.

Basically, there are two ways of preparing a statement: on the server-side or on the client-side.

Node.js Tutorial: A Beginner’s Guide

In this tutorial, I’ll teach you the basics of Node.js. Not only will you learn what Node is and what you can do with it, but you’ll see Node in action. We’ll build a simple application for a video rental store using Node, Express, Angular and MongoDB.

At a minimum, I’m assuming you have some web development experience. So you should know a bit of Javascript, HTML, and CSS, and have some familiarity with a web application framework such as ASP.NET MVC, PHP, Python or Rails. As far as Node, Express, Angular and MongoDB are concerned, I’m assuming you’re a beginner and that’s why you’re reading this tutorial. So, I’ll cover all these technologies from the ground up. If you do happen to have some experience with Angular and MongoDB, you can read this tutorial faster.

As programmers, we have long learned that Duplication is the Ultimate Sin of programming. Even considering to duplicate something is almost unthinkable.

But removing duplication introduces dependencies. If you and I use the reuse the same piece of code instead of duplicating it, changes I make may affect you. This effect can anything from beneficial (I fixed a bug you also needed fixing) to benign (I added a new feature that you’re not using) to detrimental (I want it to work in a way that’s no good for you).

When we have dependencies, we have to think: “Perhaps I shouldn’t add that feature – what if breaks something for someone else?” “Damn the torpedoes, I’m hacking it in!” or “Perhaps I’ll just make a fork for my changes and we’ll merge later”.