LibreOffice Impress: Distorted text letters in presentation mode
Upgade to LibreOffice 3.5.3+ or disable hardware accelleration in Tools → Options → LibreOffice → View → Graphic output.
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The Ruby Object Model
In Ruby (almost) everything is an Object. While this enables a lot of powerful features, this concept might be confusing for developers who have been programming in more static languages, such as Java or C#. This card should help understanding t...
The JavaScript Object Model: A deep dive into prototypes and properties
Speaker today is Henning Koch, Head of Development at makandra.
This talk will be in German with English slides.
Introduction
As web developers we work with JavaScript every day, even when our backend code uses anothe...
Lightning Talk: Coverage based Test Case Prioritization in Ruby on Rails
For my computer science bachelor's thesis I programmed and evaluated a CLI Test Case Prioritization (TCP) tool for makandra. It has been written as a Ruby Gem and was tested and evaluated against one Ruby on Rails project....
Good real world example for form models / presenters in Rails
We have often felt the pain where our models need to serve too many masters. E.g. we are adding a lot of logic and callbacks for a particular form screen, but then the model becomes a pain in tests, where all those callbacks just get in the way. O...
How to create giant memory leaks in AngularJS (and other client-side JavaScript)
This guide shows how to create an AngularJS application that consumes more and more memory until, eventually, the browser process crashes on your users.
Although this guide has been written for Angular 1 originally, most of the advice is relevant...
CarrierWave: Processing images with libvips
When you write your next CarrierWave uploader, consider processing your images with libvips instead of ImageMagick.
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Impressumspflicht bei Facebook & Twitter: Schnelle Info und Abhilfe
Jedes nicht rein private Profil auf Social Media Portalen muss ein Impressum haben, das heißt insbesondere Unternehmen und Freiberufler (§ 5 Abs.1 TMG). Wer das Impressum dort nicht unter einem eigene Button mit der Aufschrift “Impressum” oder “...
Dealing with I18n::InvalidPluralizationData errors
When localizing model attributes via I18n you may run into errors like this:
I18n::InvalidPluralizationData: translation data { ... } can not be used with :count => 1. key 'one' is missing.
They seem to appear out of the blue and the ...
Vortrag: Elasticsearch Grundlagen und Rails-Integration mit searchkick
Was ist Elastic?
- Suchmaschine, basierend auf Apache Lucene
- größtenteils Open-Source
- einige kommerzielle Features ("Elastic Stack", früher "X-Pack")
- Zugriffsrechte (bis vor kurzen)
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PSA: "index: true" in Rails migrations does not work as you'd expect
Several Rails migration methods accept index: true as an option to create an index. In some cases (like #add_column), this option is silently discarded. Know what you are doing, or use #add_index instead.
Example
Consider the following ...