When updating documents, MongoDB has a useful feature to insert a new document when no document matches the query criteria. This feature is called an upsert. Sadly, as of this writing, Dynam… Read More

I had a requirement from an upcoming project to generate unique human-readable IDs. This project is written in Node.js and uses MongoDB for its database.Ideally, I can use an auto-incrementi… Read More

Below is a simple JavaScript utility for publishing messages across browser windows of the same domain. This implementation uses the browser's localStorage and the storage event to simulate… Read More

The example below uses 2 Angular directives to change the focus behavior when pressing the tab key. The first directive is used to assign a name to a 'focusable' element.module.exports = fun… Read More

The example below shows how to increase the limitTo filter of ngRepeat everytime the div scrollbar reaches the bottom.This technique is used to improve performance by only rendering ngRepeat… Read More

Part of an effort to improve the security of CheckTheCrowd.com is to enable SSL on my web server. Enabling SSL allows it to support HTTPS connections.The CheckTheCrowd web application is hos… Read More

Directives are the cornerstone of every Angular application. And templates help keep their behavior separate from the presentation.Karma works well with Angular and is an essential tool for… Read More

Below is a code showcasing Streams and Lamdas in Java 8 (written as a JUnit test allow execution of individual methods).@RunWith(BlockJUnit4ClassRunner.class)public class Java8Showcase { @F… Read More

Unlike traditional databases, MongoDB does not support transactions. So suppose you have multiple documents and want to perform a "save all or nothing" operation, you'd have to simulate a tr… Read More

My website, CheckTheCrowd.com, was initially using the Google Maps JavaScript API (Places Library) to fetch details on the various places submitted to the website.Place details such as names… Read More

Browsers usually cache static resources like JavaScript and CSS so that downloads are reduced the next time the same website is visited. However, if the JavaScript or CSS gets updated in the… Read More

My previous post introduced Flowee as a framework for building Java services backed by one or more workflows. Through a sample application, this post will demonstrate how easy it is to… Read More

OverviewWe all know that Interfaces allow us to write loosely-coupled components, and that this "loose-coupledness" comes-in handy during unit testing. Because we can separate the implementa… Read More

I recently launched a website called CheckTheCrowd.com. And in order for search engines to effectively crawl my content, I needed a sitemap.Since my content is mostly generated from the data… Read More

Update: While I still recommend this post for good reading, please refer to this post for a better approach at doing this.My previous post explained how we can use AnnotationMethodHandlerAda… Read More

Let me begin by clarifying that this post is more about testing the correctness of annotations applied to Spring Controllers rather than unit testing the behavior of the controller methods.A… Read More

Since I started working on Node.js for an upcoming project, I've become a fan of Sublime Text. It is fast; extensible; has great community support; and most importantly, runs on Linux.S… Read More

OverviewMy past roles required me to write three different applications having surprisingly similar requirements. These requirements were:The application must run as a service which receives… Read More