If you have a flaky command you can use the nick-invision/retry to re-try a failing command, optionally with a timeout:

---
...
jobs:
  test:
    ...
    steps:
    - name: Run tests
      uses: nick-invision/retry@v2
      with:
        timeout_seconds: 30
        max_attempts: 3
        command: bundle exec rake spec

Basic error pages

To add a few basic styles to the default error pages in Rails, just edit the default templates in public, e.g. public/404.html.

A limitation to these default templates is that they're just static files. You cannot use Haml, Rails helpers or your application layout here. If you need Rails to render your error pages, you need the approach below.

Advanced error pages

1. Register your own app as the applicatio...

The attached patch lets you find a record by a string or number in any column:

User.find_by_anything('carla')
User.find_by_anything('email@domain.de')
User.find_by_anything(10023)

There's also a bang variant that raises ActiveRecord::NotFound if no record matches the given value:

User.find_by_anything!('carla')

Boolean and binary columns are excluded from the search because that would be crazy.

I recommend copying the attachment to features/support/find_by_anything.rb, since it is most useful in Cucumber step def...

If you want to find the commits that touched a specific text in a file, use

git log -S 'text in the code' -- path/to/file

If you use tig you may run a similar command to get a navigatable list of affected files:

tig -S'text in the code'

Example

Here is an example, where the move of the convert_number_column_value(value) method in active record is traced (simplified output):

git log -n 1 --pretty=oneline -S 'convert_number_column_value(value)' -- activerecord/lib/active_record/base.rb
ceb33f84933639d3b6...

In case your integration tests crash with a message like below, try to upgrade Capybara to a newer version (3.35.3 was good enough). You might encounter this issue when you enabled the w3c option in Selenium.

undefined method `log' for #<Selenium::WebDriver::Remote::W3C::Bridge:0x000055995647ded0>

Your affected code might look similar to this call below and will work after the upgrade again.

Capybara added a deprecation warning in version 3.35.3 (version from 2019) that shows up if your selector is not of type String or Symbol.

Example:

click_link(10) # bad
click_link("10") # good

You might encounter this error e.g. in a pagination step or similar where you want to click on numbers. To figure out where this deprecation warning comes from try to run the tests with a step output.

bundle exec parallel_cucumber --test-options "--format=pretty" feature

The deprecation message looks like following:

Locator In...

6.0.0 2021-06-02

Compatible changes

• geordi commit will continue even if one of the given projects is inaccessible. It will only fail if no stories could be found at all.

Breaking changes

• Removed VNC test browser support for integration tests – Headless Chrome has
  matured and is almost a drop-in replacement. Also, key binding issues have
  increased with VNC and recent Linux.
  • Please use a headless Chrome setup https://makandracards.com/makandra/492109-capybara-running-tests-with-headless-chrome.
  • You might also ...

Cookies without an expiration timestamp are called "session cookies". [1] They should only be kept until the end of the browsing session.

However, when Chrome or Firefox are configured to reopen tabs from last time upon start, they will keep session cookies when closing the browser. This even applies to tabs that were closed before shutting down the browser.

This is by design in Chrome and [Firefox](https://bugzilla.mozilla.org/buglist.cgi?bug_id=337551,345830,358042,362212,36...

We recently noticed issues with Chrome 75+ when having the w3c option enabled within the Selenium webdriver. It looks like recent Selenium versions don't have any issues with the w3c interface anymore. And starting with Chrome 91 this fix might cause unexpected issues, so you should try to enabled this option again or just remove the following line from you configuration:

options.add_option('w3c', false)

Background: Setting the w3c option t...

When giving a presentation where you do some coding, the font size you usually use is probably a bit too small and makes code hard to read for users on smaller screens or low-bandwidth connections when the image quality is lower.

Here are two solutions.

Presentation Mode

RubyMine offers a "Presentation Mode" which you can use. Simply navigate to View → Appearance → Enter Presentation Mode to enable it.
This will increase your code editor's font size as well as your UI and works nicely when sharing a single file.

However, some control...

Table of content for the linked article:

1. The `loading=lazy` attribute
2. Email, call, and SMS links
3. Ordered lists `start` attribute
4. The `meter` element
5. HTML Native Search
6. Fieldset Element
7. Window.opener
8. Base Element
9. Favicon cache busting
10. The `spellcheck` attribute
11. Native HTML sliders
12. HTML Accordion
13. `mark` tag
14. `download` attribute
15. Performance tip
16. Video thumbnail
17. input type="search"

Remember How to skip Sprockets asset compile during Capistrano deployment and Automatically skipping asset compilation when assets have not changed? Turns out there is an even better way to speed up Capistrano deployments with asset compilation – and it's even simpler.

Adding the asset cache directory to symlinked directories

Popular asset managers for Rails are Sprockets and Webpacker. Both keep a cache of already compiled files that we're going to leverage for deployments now.

• Sprockets cache...

I encountered a unlucky behavior of byebug 11.1.3 (the most recent version at time of writing) when using it with Rails 6 and it's new autoloading component, zeitwerk. There already is a issue for that, so I hope it will be fixed with a future release.

The following test succeeds:

  context 'factories' do
    let(:test_case) { FactoryBot.create(:test_case) }
    it 'are valid' do
      expect(test_case).to be_valid
    end
  end

But when I did the same in byebug the foll...

While renaming a file sometimes feels like "dropping its history", that is not true: Just use git log --follow on renamed files to access their full history.

Given a file "bar" that was previously named "foo":

touch foo
git add foo
git commit -m "Add foo"
mv foo bar
git add bar
git commit -m "Rename foo to bar"

git log bar

commit adc8e6a05b65355359c4e4618d6af0ed8f8b7f14 (HEAD -> git-follow)
Author: Michael Leimstaedtner <makmic@makandra.de>
Date:   Wed May 12 08:49:37 2021 +0200

    Rename foo to bar

git lo...

jQuery doesn't store information about event listeners and data values with the element itself. This information is instead stored in a global, internal jQuery cache object. Every time you add an event listener or data value to a jQuery object, the jQuery cache gains another entry.

The only way that a jQuery cache entry gets deleted is when you call remove() on the element that put it there!

Since cache entries also have a pointer back to the element that spawned them, it is easy to create DOM elements that can never be garbage-co...

Occasionally, you have to talk to APIs via HTTPS that use a custom certificate or a misconfigured certificate chain (like missing an intermediate certificate).

Using RestClient will then raise RestClient::SSLCertificateNotVerified errors, or when using plain Net::HTTP:

OpenSSL::SSL::SSLError: SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed

Here is how to fix that in your application.

Important: Do not disable certificate checks for production. The interwebs are full of people say...

When dealing with external data sources, you may have to deal with improperly encoded strings.
While you should prefer deciding on a single encoding with the data-providing party, you can not always force that on external sources.
It gets worse when you receive data with encoding declaration that does not reliably fit the accompanying string bytes.

Here is a Ruby class that helps converting such strings to a proper encoding.
Note that it tries several approaches of changing the encoding. **This is not a silver bullet and may or may not work...

Browsers usually cache website content in order to provide the user with faster responses. Examples are returning to a website using the "Back" button, or reopening a browser and restoring previous tabs.

However, there are applications where this kind of client caching produces annoying results: a time tracking tool may show a wrong clock-in state, or an SPA todo app may display an outdated list. In these cases, client caching should be disabled.

In order to prevent client caching, set a Cache-Control header of no-store. This tells _...

You can publish pre-release versions of an npm package.

Naming convention for pre-release versions

An npm package must use Semantic Versioning's naming convention for its version. In Semantic Versioning, the version number and pre-release identifier (like rc1) must be separated by a dash, like this:

• 1.0.0-rc1
• 2.3.0-alpha2
• 3.0.0-beta3

Publishing to a pre-release tag

npm packages have multiple "current" releases, identified by "tags". The default tag is latest. It is expected to contain the la...

When a Ruby version gem has a letter in its version number, it is considered a pre-release:

• 1.0.0.rc1
• 2.3.0.alpha2
• 3.0.0.beta3
• 4.0.0.pre.rc2

Even if a pre-release gem has the highest version number, it is never installed unless the user explictily requested the version:

gem install foobar --version="=2.3.0.alpha2"

Also bundle update will never update a stable version to a pre-release version unless the user explicitly requests it in the Gemfile:

gem 'foobar', '=2.3.0.alpha2'

A note on Semanti...