When you are using the default MIME-Type configuration and your application allows uploading files, it can be a security...
Web forms can be made much more usable with a few HTML attributes. Short summary: type: Tells browsers about the...
When you allow file uploads in your app, a user might upload content that hurts other users. Our primary concern...
Rack::SteadyETag was a Rack middleware that generates the same default ETag for responses that only differ in XOR-masked...
Every Rails response has a default ETag header. In theory this would enable caching for multiple requests to the same...
Haml 6 was a major rewrite with performance in mind. To achieve a performance improvement of 1.7x, some design...
Usually you add errors to :base in ActiveRecord, in case no appropriate attribute could be used to add the error...
Maintaining larger projects makes it more difficult to balance refactoring and upgrade tasks according to its actual value. Consider to...
Let's say we have posts with an attribute title that is mandatory. Our example feature request is to tag...
Rails offers the fresh_when method to automatically compute an ETag from the given record, array of records or scope...
Since Ruby 3.2.0 you can measure coverage support for eval statements and support has been added for the simplecov gem...
When a nginx reverse proxy complains about upstreams sending too big headers, tweaking the buffers responsibly can help to prevent...
This is a checklist I use to work on issues. For this purpose I extracted several cards related to the...
Rails partials have a lot of "hidden" features and this card describes some non-obvious usages of Rails Partials.
Not all email clients support external images in all situations, e.g. an image within a link. In some cases, a...
You can execute systemctl --user --failed to check for failed systemd user units. But let's face it: It's...
If you've stumbled over display: grid while reading the Flexbox material of the previous card - we've got you...
Erfülle die Aufgaben Zeige deinem Mentor in einer Live-Demo was du umgesetzt hast. Wenn du Aufgabe 4 betrachtest...
Jasmine specs for the frontend often need some DOM elements to work with. Because creating them is such a common...
tl;dr The Chrome DevTools are a neat collection of tools for the daily work as a web developer. If...
Wir arbeiten in einem Umfeld in dem sich fast alles um das Web und HTTP dreht. Wir betreiben Webseiten und...
Hat man wechselnde Lastzustände für seine Applikation und möchte Geld einsparen, kann man seine Applikation und die Infrastruktur so designen...
tl;dr In Chrome DevTools in the Elements tab or in Firefox in the Inspector tab you can right click...
You have uncommited changes (you can always check by using git status), which you want to discard.