You can throttle the network in your headless chrome via Selenium. This might be useful for debugging issues with flaky integration tests or slow page simulations.

page.driver.browser.network_conditions = {offline: false, latency: 5, download_throughput: 2 * 1024, upload_throughput: 2 * 1024}

The settings will match to the following UI component in Chrome:

Were the values for the default profiles might match the values from this post:

**S...

The Git stash does not work like a one-slot clipboard and you might shoot yourself in the foot if you pretend otherwise.

In particular git stash apply does not remove the stashed changes from the stash. That means you will probably apply the wrong stash when you do git stash apply after a future stashing.

To keep your stash clean, you can use

git stash pop

instead.

Another way to look at it:

git stash pop 

is the same as

git stash apply && git stash drop

Notice: In case of a conflict git will not pop th...

Rails 3+ allows you to join two scopes from arbitrary sources by calling the merge method:

scope1 = User.where(:email => 'foo@bar.com')
scope2 = User.where(:first_name => 'hans')
merged_scope = scope1.merge(scope2)

merged_scope.to_a will now trigger a query for the combined scope chain:

SELECT `users`.* FROM `users` WHERE `users`.`email` = 'foo@bar.com' AND `users`.`first_name` = 'hans'

If you are joining two models, you can also merge scopes for different models ([old blog post](https://web.archive.org/web/2018040106...

Note: This process is tailored to our specific needs and tools at makandra. While it will certainly not apply to all (especially larger teams), we think it is a helpful starting point. Compare also the Gatekeeping: Guide for gatekeeper card.

In order to reduce the number of rejects we get from clients, we want to review all code written before it goes to the staging server.

If your project manager wants to do gatekeeping o...

Built-in loading indicator

Unpoly now shows an animated progress bar that appears for late requests.

The progress bar is enabled by default. If you're using unpoly-migrate.js, the progress bar is disabled if you have an up:request:late listener, assuming that you have built a custom loading indicator.

Simplified history opt...

I ran into a situation in which I received the yarn integrity check warning when starting the rails console even though everything was up to date and correct versions in use.

TLDR: run spring stop

I tried starting the rails console without switching to the correct node version first and received the yarn integrity warning.

warning Integrity check: System parameters don't match                                                                                     
error Integrity check failed                                         ...

This card tries to summarize by example the different uses of heredoc.

• In Ruby << vs. <<- vs. <<~
• In Rails strip_heredoc vs. squish

strip_heredoc should be used for a text, where you want to preserve newlines. (multi-line -> multi-line)

squish should be used for a text, where you want to squish newlines. (multi-line -> one-line)

Ruby 2.3+

def foo
  bar = <<~TEXT
    line1
    line2
    line3
  TEXT
  puts bar.inspect
end
foo => "line1\nline2\nline3\n"

Read more: [Unindent HEREDOCs in Ruby 2.3](/makan...

Starting with Ruby 2.0 you can define methods with keyword arguments.

In 2.1+ required keyword arguments can be defined by using a colon without default value:

def match(value, ignore:)
  ...
end

To accomplish something similar in ruby 1.8, use:

def match(value, options = {})
  ignore = options.fetch(:ignore)
  ...
end

When using RestClient to make an HTTP request, it will raise an exception when receiving a non-successful response.
HTTP status codes like 422 or 403 might be totally expected when talking to APIs, so plastering your code with rescue RestClient::Exception or similar can feel annoying.

It may not be intuitive, but the readme says you can also pass a block to methods like RestClient.get or RestClient::Request.execute. In that case, RestClient will not raise ...

If you already selected an element and want to get its parent, you can call find(:xpath, '..') on it.
To get the parents parent, call find(:xpath, '../..').

Example

Find a link which contains a twitter icon and check that it links to the correct page:

<a href="http://twitter.com/">
  <i class="icon is-twitter"></i>
</a>

link = page.find("a .icon.is-twitter").find(:xpath, '..')
link[:href].should == "http://twitter.com/"

There is a good overview on xpath syntax on [w3schools](https://www.w3schools.com...