Slides for Henning's talk on Sep 21st 2017. Understanding sync vs. async control flow Talking to synchronous (or "blocking...
If you are using PDFKit / wkhtmltopdf, you might as well want to use custom fonts in your stylesheets. Usually this...
Let's say you have a folder images and want to to move all files in there to a new...
Hack to implement an inverted "night mode" theme with a few lines of CSS. Colors in images are preserved.
While the hardware mute button of my Lenovo x230 worked on Ubuntu 14.04 out of the box, it does not...
Let's say you have a form that you render a few times but you would like to customize your...
After loading a staging dump into development, you might get an ActiveRecord::EnvironmentMismatchError when trying to replace the database (like...
When localizing model attributes via I18n you may run into errors like this: I18n::InvalidPluralizationData: translation data {...
...} can not be...
If another session is accessing your database you are trying to reset or drop you might have seen the following...
You need to disable "Bluetooth low energy", then follow these core steps: Make sure the headphones are in pairing mode...
Here is some JavaScript code that allows you to click the screen and get the clicked element's text contents...
Use return to return from a method. return accepts a value that will be the return value of the...
If you want to ssh into your vagrant box without switching into the project directory and typing vagrant ssh, you...
Scope is all about where something is visible. It’s all about what (variables, constants, methods) is available to you...
Use Traim to build a RESTful API for your ActiveRecord models with very little code. Traim assumes your API resources...
Sometimes you add Paperclip image styles, sometimes you remove some. In order to only keep the files you actually need...
In the ruby shell (IRB) and rails console the return value of the previous command is saved in _ (underscore). This...
Put the line below in the respective env.rb file to make your action controllers raise an ActionController::UnpermittedParameters error when...
You can configure a Ubuntu system as a gateway in order to share it's internet connection (maybe via WLAN...
select2 is a great jQuery library to make (large) fields more usable. For Bootstrap 3 there is select2-bootstrap-theme...
Webpack is the future. We're using it in our latest Rails applications. For tests, we want to compile assets...
RawGit serves raw files directly from GitHub with proper Content-Type headers, for CDN-like purposes. Note that they don...
When using GROUP BY, MySQL now complains if the SELECT includes columns which are not part of the GROUP BY...
Nowadays it is fairly easy to intercept and modify mails globally before they are sent. All you have to do...