If your application exports CSV, be advised that Excel and other spreadsheet applications treat certain cells (those starting with =, +, - or...
We're usually running Ubuntu LTS versions. Sometimes newer hardware requires packages from more recent Ubuntu releases that only come...
Checking if a JavaScript value is of a given type can be very confusing: There are two operators typeof and...
RSpec allows you to mark a single Example/ExampleGroup so that only this will be run. This is very useful when...
If you already selected an element and want to get its parent, you can call find(:xpath, '..') on it.
When an Rspec example fails, I usually investigate by running that example again using rspec . However, this does not work...
You are not using javascript tests The file is served from a public folder (not via controller) Problem description...
An end-to-end test (E2E test) is a script that remote-controls a web browser with tools like Selenium...
When your public-facing application has a longer downtime for server maintenance or long migrations, it's nice to setup...
Browsers support different types of redirects. Be very careful with these status codes: 301 Moved Permanently 308 Permanent Redirect
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...
You need to set the :inverse_of option manually for relations that have an association to a polymorphic model. Otherwise...
RSpec allows defining methods inside describe/context blocks which will only exist inside them. However, classes (or any constants, for that...
While the hardware mute button of my Lenovo x230 worked on Ubuntu 14.04 out of the box, it does not...
FactoryBot allows a :class option to its factory definitions, to set the class to construct. However, this option is not...
On my Ubuntu MATE machine, switching applications with ALT + TAB was impossible, because it took nearly 2 seconds. The culprit...
There are several gems that make it easy to read and process xlsx files. Parsing the entire file at once...
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...
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...
I frequently find myself needing a combination of group_by, count and sort for quick statistics. Here's a method...