Sharing Angular modules like a boss
What forRoot and forChild have to do with lazy loading You just created a beautiful Angular component. Now, being the exemplary developer that you are, you want to share it with others. In Angular, you achieve this by moving it to a separate NgModule. The...
Drag ‘n Drop in Angular: Part 1 – The Draggable Directive
The first part of this series starts with the foundation: the draggable directive. This directive has only one responsibility: tracking the dragStart, dragMove and dragEnd events. Background To have the ultimate freedom, I recommend to stay away from the HTML5 Drag and Drop API. Of course, HTML5...
Drag and drop in Angular (new #tutorial series!): introduction
Remember using jQuery UI's Draggable and Droppableplugins, for building drag and drop features in web applications? Awesome, wasn't it? Now, what if we could implement drag and drop functionality just as easily in Angular projects? Over the last months, I have been improving my drag and drop implementations...
Optimize your Angular app using trackBy #tutorial
This blog is part of an Angular instructional / tutorial series, please find the first edition here: Angular structural directives demystified. Optimize your Angular app using trackBy When rendering lists using Angulars ngFor directives, objects are compared by reference. This is fast, but can result in unwanted DOM manipulations. Luckily,...
Angular structural directives demystified #tutorial
This blog is part of an Angular instructional / tutorial series, please find the second edition here: Optimise your Angular app using trackBy. Angular structural directives demystified As Angular developers, we use structural directives like ngIf and ngFor all the time. But how do structural directives actually work? Structural directives...
Java 10 in 5 minutes
From Java 9, Oracle will release a new version of Java every 6 months, starting with Java 10, which is to be released on march 20, 2018. This blog highlights the major language and API changes in Java 10. Local variable type inference For local...
Smart Express, a hobby project
In the summer of 2015 I started building a web application for a friend who owns a small courier company, named Smart Express. Smart Express picks up packages at a specified locations and delivers them to other locations. Additional services and options aside, prices are...
Van bolle monoliet tot futuristische microservices
bol.com is een webwinkel in Nederland en België die in 1999 werd opgericht door het Duitse mediaconcern Bertelsmann AG. Het hoofdkantoor staat in Utrecht. Na een aantal moeizame beginjaren is bol.com ondertussen uitgegroeid tot de Beste webwinkel van Nederland en in 2014-2015 zelfs tot Beste webwinkel van Europa. Door deze...
An introduction to Machine Learning with Apache Spark
A while ago I followed a course in Machine Learning on Coursera. In this course I did some exercises in R, which is a language suitable for statistical computing and data analysis. Because I am a Java software engineer, I wanted to try to do...
Fork your HTTP client: supporting non-global HTTP interceptors in Angular
Most AngularJS developers are probably familiar with the concept of HTTP interceptors: a mechanism for modifying request and responses. This feature is commonly used for cross-cutting concerns such as authentication, logging and error handling. When Angular 2 was introduced it became clear there (initially) would...