This is a small example on how you can check if your Postgres index can be used by a specific...
When you print (or print preview) and elements are cut off (e.g. after 1st page, or "randomly") you should check...
When writing XLSX files, there are gems like rubyXL or axlsx. While they do offer features like formatting or graphs...
Sometimes when working with VCR you still want to use webmock. Since VCR hooks into webmock and fails when an...
An end-to-end test (E2E test) is a script that remote-controls a web browser with tools like Selenium...
Slides for Henning's talk on Sep 21st 2017. Understanding sync vs. async control flow Talking to synchronous (or "blocking...
RawGit serves raw files directly from GitHub with proper Content-Type headers, for CDN-like purposes. Note that they don...
Since Rails 5, domain models inherit from ApplicationRecord by default. This is the place to put code that should be...
Rails supports time zones, but there are several pitfalls. Most importantly because Time.now and Time.current are completely different things and...
By default Middleman generates files with a .html extension. Because of this all your URLs end in /foo.html instead of...
Middleman is a static page generator that brings many of the goodies that Rails developers are used to.
Imagine the following HTML structure, where the scrolling container has overflow-y: scroll: +--scrolling container+-+ | | | +-child element+----+ | | | ++iframe++ | | | | | | | | | | | | | | +-----------------------+ | | | | <-- actually cut...
Looks like ActiveState is trying to market a new Ruby distribution for Enterprises: ActiveRuby Enterprise Edition is designed for businesses...
Website that offers lots of different kinds of HTTPS configurations, bad or good or complicated. They also offer a dashboard...
run-one is a wrapper script that won't run the given command while another instance of it is running...
First find the reference for the entry you want through looking at the stash: $ git stash list stash@{0}: WIP...
Sometimes huge refactorings or refactoring of core concepts of your application are necessary for being able to meet new requirements...
You may know the double asterisk operator from Ruby snippets like Dir['spec/**/*_spec.rb'] where it expands to an arbitrary...
Exercise 1: XML On the start page of your Movie DB, show the title of a random movie that is...
TL;DR: Update the 'net-ssh' gem by adding to your Gemfile: gem 'net-ssh', '=2.9.1' Now run bundle update...
Building plain text emails with an .erb template doesn't allow you to indent code like you normally do in...
If your external displays not switching on or showing a weird behavior (for e.g. all displays getting the same configuration...
There is no CSS selector for matching elements that contains a given string ¹. Luckily, Capybara offers the :text option to...
This might be relevant for us since we're often managing customer documents in our apps. I played around with...