...you can install the official Java JRE: sudo apt-get update sudo apt-get install sun-java6-jre You can now check your default JVM with java -version. It should...
...versions below 10.10. If it does, please update this note. sudo add-apt-repository ppa:sun-java-community-team/sun-java6 You probably want to get rid of OpenJDK (which is...
If you have an html_safe string, you won't be able to call gsub with a block and match reference variables like $1. They will be nil inside the...
...with rails_xss) as well as Rails 3 applications. Here is a fix to SafeBuffer#gsub. Note that it will only fix the $1 behavior, not give you a safe...
...at the same time. When assets did not change, we do not want to spend time compiling them. Here is our solution for all that. Its concept should work for...
...all test suites. Copy the following to config/initializers/webpacker_compile_once.rb. It will patch Webpacker, but only for the test environment: # Avoid hardcoded asset hosts in webpack, otherwise all chunks would be loaded...
...don't only have a favicon.ico in your project but also PNGs of different sizes and backgrounds, you should test if all those files are actually reachable.
...few selectors to get you started: 'link[rel~="icon"]' # regular ones, matches "shortcut icon" and "icon" 'link[rel="apple-touch-icon"]' # iOS 'meta[content][name="msapplication-TileImage"]' # IE11 'meta[content...
This card shows you how to format a card's content using Markdown. We use the Commonmarker interpreter, so here are examples for its dialect. Formatting **Bold** Bold _Italics_
Add a new line for a paragraph. Headlines Underline headlines with an equals sign or dash -- or start a line with a hash symbol: Hello World ----------- Lorem ipsum...
In Cucumber, scenario outlines help avoiding tests that are basically the same, except for a few variables (such as different inputs). So far, nothing new. The problem
...your test should (or should not) do something, like filling in a field only for some tests? Scenario Outline: ... When I open the form And I fill in "Name" with...
...to do it. Make an educated decision: Is the code change worth the effort? Stay straight on track, don't go astray. Note: Usually, you'd refactor after finishing your...
...story. At times, it might be necessary to refactor up front. But try to keep refactoring out of your current task. Knowing where to optimize Things should only be optimized...
I recently did a quick research on how to better write down multiline statements like this: # Dockerfile RUN export DEBIAN_FRONTEND=noninteractive \ && apt-get update \ && apt-get dist-upgrade -y...
...apt-get install --no-install-recommends --no-install-suggests -y \ ca-certificates \ curl \ unzip It turns out, there is! Buildkit, the tool behind docker build added support for heredoc strings...
...ago and don't remember which one it is? You can go to chrome://settings/appearance (on Chrome 61+) to see the theme's name, and click a link to open...
...it in the Chrome Web Store. If you are on an older version, or if the above no longer works, you have to check Chrome's Preferences file. Linux /home/YOUR_USER_NAME/.config/chromium/Default/Preferences...
In Rails, we usually have a mailer setup like this: class MyMailer < ActionMailer::Base def newsletter mail to: 'receiver@host.tld', from: 'sender@host.tld', subject: 'My mail' end end If you want to...
...Rails will print the mail's text representation to your log/development.log. You may also save this output as-is to an .eml file and open it with your mail client...
...modern JavaScript down to EcmaScript 5. Depending on what browser a project needs to support, the final Webpack output needs to be different. E.g. when we need to support IE11...
...JavaScript features. Hence our output will be more verbose than when we only need support modern browsers. Rails 5.1+ projects often use Webpacker to preconfigure the Webpack pipeline for us...
Most browsers have built-in drag and drop support for different page elements like text and images. While this may be useful in most situations, it may become annoying in...
...functionality. This does no longer work. You may now achieve this by explicitly preventing the startdrag-event:
const noDragElement = document.querySelector('no-drag-pls') noDragElement.addEventListener('dragstart', event => event.preventDefault())
Angular directives with isolate scopes have three different variable binding strategies, of which one is =. Example: # HTML # Coffeescript @app.directive 'panel', -> scope: evaluated: '=value' bound: '=twoway' link: -> scope.evaluated # = false scope.bound = 'foo...
...bound with = (value, twoway) have their value evaluated as Angular expression in the parent scope's context and have the result assigned to the corresponding scope variable (evaluated, bound). It...
Fresh Chrome installations now show a "Choose your search engine" popup in Europe. This might make your Cucumber tests fail. Fortunately there is a flag to disable the popup. Add...
...the following option to your chromedriver setup code: options.add_argument('--disable-search-engine-choice-screen') I found this flag in Peter Beverloo's list. Background: This was experienced locally with...
...GitHub repository is a bit like our "dev" cards deck, but groomed from a single person (Josh Branchaud). It includes an extensive list of over 900 TILs on many topics...
...TILs that were new to me. I encourage you to take your time to skim over the original list as well! Assoc For Hashes Hash#assoc can be used to...
To update your Rubygems to the latest available version, type the following: gem update --system Note that you have a separate Rubygems installation for each Ruby version in your RVM...
...or rbenv setup. Updating one does not update the others. Ruby 1.8.7 If you are using Ruby 1.8.7 you cannot use the latest version of Rubygems. Type the following to...
Sometimes you want to write a test for a business rule that's based on multiple variables. In your goal to cover the rule thoroughly, you start writing tests for...
...each permutation of all variables. Quickly it blows up into something unsustainable. With n variables for the business rule, you get 2n permutations/test cases. This is manageable with 2 variables...
Some users might use Adblock Plus or similar browser plugins to reduce the number of ads displayed. If you run into an issue that your application or part of an...
...our web apps. But if your application uses iframes or is embedded in another site it's more prone to it. Blocked elements most of the time appear to the...
If others on a call (Skype, SIP, ...) can not hear you loud enough, your volume levels are probably too low. Also, Skype may be changing your mixer levels.
...proper recording volume Open your mixer software (run pavucontrol). Switch to input devices. If you have more than one recording device, find the correct one. Make a test call to...
...has to decide whether and how to do authorization. The usual approaches are: Using send_file with a regular controller. This is secure, but potentially slow, especially for large collections...
...This is fast (because Apache can deliver assets without going through Rails), but less secure. When going with the "unguessable URL" approach, it is possible to somewhat increase security by...
...need to use XPath, you can have Nokogiri help you out on creating it. Simply use Nokogiri's xpath_for: Nokogiri::CSS.xpath_for('#foo') # => ["//*[@id = 'foo']"] Nokogiri::CSS.xpath_for('#foo...
...bar:nth-of-type(2)') # => ["//*[@id = 'foo']//*[contains(concat(' ', @class, ' '), ' bar ') and position() = 2]"] Since XPath is more powerful you may still need to do some hardcore XPath hacking eventually...
Stringex is a gem that offers some extensions to Ruby's String class. Ruby 1.9 compatible, and knows its way around unicode and fancy characters...
...Examples for stringex's String#to_url method: # A simple prelude "simple English".to_url => "simple-english" "it's nothing at all".to_url => "its-nothing-at-all"
Today I needed to execute a ruby gem executable with sudo. But, surprisingly, bash would tell me command not found for the gem that ran lovely without sudo.
...are installed to /var/lib/gems/1.8/bin, which is not in sudo’s PATH. Unfortunately, you can’t change the path, since sudo for Ubuntu is compiled with the --with-secure-path option...
...with modern CSS features In the past, you might have resorted to bulky JavaScript solutions or CSS hacks like transitioning between max-height: 0 and max-height: 9999px. All of...
...them were awkward and/or have several edge cases. With modern CSS, there is actually a way to do it properly: Just use a display: grid container which transitions its grid...