Since jQuery 3 saw it's first release candidate today, the links has a list of (breaking) changes.

brandcolors.net provides you with the colors of the world's biggest brands, easily searchable.

When you have a localized website, you may want to redirect users to their preferred language when they visit the root path.
Here is how to do it without a server-side component (like a Rails application).

• Use JavaScript's navigator.language (real browsers and IE11+) and navigator.userLanguage (old IEs).
• Use a <meta> refresh as fallback
• Provide buttons for paranoid users that disabled JavaScript and meta refreshs.

JavaScript

The following JavaScript will try to auto-detect a user's preferred language.

It understands string...

fake_stripe spins up a local server that acts like Stripe’s and also serves a fake version of Stripe.js, Stripe’s JavaScript library that allows you to collect your customers’ payment information without ever having it touch your servers. It spins up when you run your feature specs, so that you can test your purchase flow without hitting Stripe’s servers or making any external HTTP requests.

We've also had tests actually hitting the testing sandbox of Stripe, which worked OK most of the time (can be flakey).

When you run rake db:rollback and nothing happens, you are probably missing the latest migration file (or have not migrated yet).

$ rake db:rollback
$ 

If that happens to you, check your migration status.

$ rake db:migrate:status
   up     20160503143434  Create users
   up     20160506134137  Create pages
   up     20160517112656  Migrate pages to page versions
   up     20160518112023  ********** NO FILE **********

When you tell Rails to roll back, it tries to roll back the latest change that was mi...

Adds missing native PostgreSQL data types to ActiveRecord and convenient querying extensions for ActiveRecord and Arel for Rails 4.x

Common table expressions

• Relation#with
• Model.from_cte

Arrays

Face.where.contains tags: %w[happy smiling] # Matching faces have both 'happy' and 'smiling' tags
Face.where.overlap tags: %w[happy smiling] # Matching faces have at least one of these tags
Face.where.any tags: 'happy' # Matching faces include the 'happy' tag
Face.where.all tags: 'dunno' # Not documented, try for yourself

...

When you paste copied code with CTRL+V, RubyMine will change the indentation of the pasted code. You can prevent this by pasting with CTRL+ALT+Shift+V instead ("Paste Simple").

To change this behavior entirely, you can open your settings and navigate to Editor / General / Smart Keys. Here you can select one of three options for Reformat on paste:

• None
• Indent Each Line (default)
• Indent Block
• Reformat Block

You might want to try "Indent Block".

Capybara uses www.example.com as the default hostname when making requests.
If your application does something specific on certain hostnames and you want to test this in a feature, you need to tell Capybara to assume a different host.

Given /^our host is "([^\"]+)"$/ do |host|
  page.config.stub app_host: "http://#{host}"
  
  # In older Capybaras (< 2.15) you needed to do this instead:
  Capybara.stub app_host: "http://#{host}"
end

You can now say:

When I go to the start page
Then I should not see "Home ...

If you're trying to searching or installing packages via pkg the your repository data might be broken. If pkg update shows that your repositories are up to date try:

pkg update -f

Afterwards you should be able to search and install packages again.

Helix allows you to implement performance-critical code of your Ruby app in Rust, without requiring glue code to bridge between both languages.

See attached article for a longer write-up about the why and how.

• Util
• CLI

When building a form with a file select field, you may want to offer your users a live preview before they upload the file to the server.

HTML5 via jQuery

Luckily, HTML5 has simple support for this. Just create an object URL and set it on an <img> tag's src attribute:

$('img').attr('src', URL.createObjectURL(this.files[0]))

Unpoly Compiler

As an Unpoly compiler, it looks like this:

up.compiler '[image_p...

This gem gives you a rake task db:seed:dump do create a db/seeds.rb from your current database state.

The generated db/seeds.rb will look this:

Product.create!([
  { category_id: 1, description: "Long Sleeve Shirt", name: "Long Sleeve Shirt" },
  { category_id: 3, description: "Plain White Tee Shirt", name: "Plain T-Shirt" }
])
User.create!([
  { password: "123456", username: "test_1" },
  { password: "234567", username: "test_2" }
])

When your application crawls twitter profiles for tweets, it might throw HTTP 401 (Unauthorized) errors.

Those can happen for a number of reasons, one of them obviously being incorrect credentials.
However, 401 is also returned when crawling profiles that no longer exist.

True story.

Cucumber's docstrings let you add long strings to a step like this:

# foo.feature
Given this text:
"""
First line
Second line

Second Paragraph
"""

# foo_steps.rb
Given /^this text:$/ |docstring|
  puts docstring.split
end

You see these neat triple double quotes ("""). Now what to do when you need your docstring to contain triple double quotes, too?

# Does not work:
Given this text:
"""
Docstrings work like this:
  """
  Docstring example
  """
You see?
"""

Update: Official solution

You can escape the inner quotes ...

Instead of using this hack you might want to use MariaDB 10.x which can work with both old and new apps.

An alternative could be to use the MySQL Docker image which is still updated for 5.6.

Ubuntu 16.04 only provides packages for MySQL 5.7 which has a range of backwards compatibility issues with code written against older MySQL versions.

Oracle maintains a list of official APT repositories for MySQL 5.6, but those repositories do...

Tool to show you which gems are slow to load:

➜  git:(master) ✗ bundle exec bumbler
[#################################################                             ]
(49/65) travis-lint...
Slow requires:
    110.21  render_anywhere
    147.33  nokogiri
    173.83  haml
    179.62  sass-rails
    205.04  delayed_job_active_record
    286.76  rails
    289.36  mail
    291.98  capistrano
    326.05  delayed_job
    414.27  pry
    852.13  salesforce_bulk_api

Showing various caching patterns. Includes WhatsApp screenshots.

OAuth requires a set of params to be carried along requests, among which a nonce. Some libraries pass these along as headers, some as query parameters. All fine.

When you're using VCR, the latter case is an issue. By default, requests are matched on method and URI. However, no request URI will equal another when they include a nonce. You won't be able to match these requests with VCR.

Solution

Obviously you need to...

Awesome is a very good tiling window manager that provides neat features like automatic layouting of windows, good multi-display support with per display workspaces and more. Since it is only a window manager, you will probably miss some of MATE's conveniences like the network manager, application menus, automatic updates etc.

Fortunately, you can run Awesome within MATE, by following these steps (tested on Ubuntu MATE 16.04):

Awesome + MATE

• Create the followi...

If you want to access top-level constants inside a BasicObject class, you need to prefix them with ::.

This will not work

class Foo < BasicObject
  def bar
    Hash.new
  end
end

Foo.new.bar # => NameError: uninitialized constant Foo::Hash

You need to explicitly write ::Hash.

The reason is that top-level constants are internally attached to Object, so Hash is not in the lookup chain inside a BasicObject.

When creating an index using CREATE INDEX, Postgres will create a B-Tree type index by default. The B-Tree type is great for general purpose indexes but there are special cases when other types provide better results.

Spreewald has steps that let you test that e-mails have been sent, using arbitrary conditions in any combination.

The attached file is for legacy purposes only.

You can use JavaScript to get or set cookie values on the client.

Using the vanilla JavaScript API

In JavaScript, document.cookie is an accessor to all cookies on the current site. It looks like a String, but its setter is actually more powerful.

When setting cookies this way, remember to set the path=/ option.

Reading cookies

A result may look like this:

hello=universe; foo=bar

This means that there are 2 cookies: "hello" with value "universe", and "foo" with value "bar...