A Table of Contents helps users navigate (long) blog posts. I use them on both posts and post. The desktop version always shows the table on the right side in the sidebar (using a text-widget with a shortcode). On mobile, I’ll only show it on long articles, using a shortcode under the first paragraph.
Read the article A Table of Contents shortcode for WordPress articles
In WordPress you have two main taxonomies: categories and tags. I use categories as a taxonomy tree. That is why I want to show the submenu on the category page. It does not come out of the box, so I created something that renders the submenu items for me.
Read the article Submenu navigation for category pages
Recently, I worked on my theme for KeesTalksTech. To gain performance, I need to rely less on plugins, that’s why I needed a simple way to show small lists of posts in my sidebar.
I’ve created 2 short codes: one that shows recent posts, used in the new section and one that shows specific posts, used in the highlights section.
Read the article Shortcodes for simple post lists in WordPress
The JavaScript Array has everything to acts as a nice Stack structure, the only thing is missing is a peek() method. In this blog I’ll discuss two ways of implementing a stack based on the array.
Read the article A Stack data structure in TypeScript
Ever since I stumbled upon the Scrutor project, I wanted to write a blog about building latency and exception logging decorators. At Wehkamp we used StructureMap in the past, but as it became obsolete and swapped out, I missed the decorators. What I love about Scrutor is how it is an extension on the way […]
Read the article Prometheus Latency Metrics & Exception Logging with Scrutor Decorators
At Wehkamp we use Redis a lot. It is fast, available and implemented as a managed AWS service called ElastiCache. Sometimes we need to extract data from Redis, and usually I use the redis-cli to interact from the command-line. But what if you need to get the values of 400k+ keys? What would you do? Is there an effective way to query multiple key/values from Redis?
Read the article Reading 400k+ key/values from Redis fast
Dependency Injection (DI) helps us to change the behavior of parts of our program on the fly. This is especially neat when you want to test your domain services against a mocked data-store. But what if you need to change the behavior of your API based on a request header?
Yesterday I had a discussion with my colleague Robert Kranenburg about this. He showed an example of a console application changing its behavior based on an argument. I took the idea and converted it into .NET Core 3.1 code to change behavior based on a cookie.
Read the article Dependency Injection based on request headers
Let’s see if we can use PIL to crop model images and resize them to a 2:3 ratio using Python Image Library (PIL). When all images on an overview are the same ratio, the overview looks way nicer. And… let’s try to make the model on the image, the center of the image.
Read the article Cropping model images using PIL
When working with images in a Python notebook I like to visualize them on a grid. Just calling display is not enough as it renders the images underneath each other. Let’s use Matplotlib to generate a single image with an image grid on it.
Read the article Plotting a grid of PIL images in Jupyter
This week I needed to query an ElastiCache instance on AWS – which is Amazons version of Redis. I could not find a decent free client to query this remote dictionary, so I ended up using redis-cli on Ubuntu. Turns out: Redis is a wonderful and powerful system to work with.
Read the article Connect to AWS ElastiCache (Redis) with redis-cli