Sometimes I ran across a GitHub merge request of a gem where it was not completely obvious in which version the change was released. This might be the case for...

Git can help you to find the next git tag that was set in the branch. This usually has the name of the version in it (as the...

You can say: $(element).is(':visible') and $(element).is(':hidden') jQuery considers an element to be visible if it consumes space in the document. For most purposes, this is...

Emulate jQuery's implementation : element.offsetWidth > 0 && element.offsetHeight > 0; jQuery > 3 Query 3 slightly modifies the meaning of :visible (and therefore of :hidden). Emulate jQuery's implementation: !(window.getComputedStyle(element...

Ruby's regular expressions can be represented differently. When serializing them, you probably want to use inspect instead of to_s. For the examples below, consider the following Regexp object...

>> regexp.to_s => "(?mi-x:^f(o+)!)" inspect As the Ruby docs say: Perhaps surprisingly, #inspect actually produces the more natural version of the string than #to_s...

...flaky tests. You should always try to fix those instead of rerunning them regularly. Setup Configure RSpec to persist the result of your test runs to a file. This is...

...necessary to be able to rerun examples. Add this to your spec/spec_helper.rb : config.example_status_persistence_file_path = 'spec/examples.txt' Rerun all failed examples using --only-failures bundle exec rspec --only-failures...

...lot less than you think. "private" does not apply to class methods defined on self This does not make anything private: class Foo private def self.foo 'foo' end end

...need to use private_class_method instead: class Foo def self.foo 'foo' end private_class_method :foo end "private" does not apply to define_method This does not make anything...

...IDENTIFIED BY 'some_password'; GRANT REPLICATION SLAVE ON *.* TO 'replicator'@'%'; Adjust MySQL configuration Edit /etc/mysql/my.cnf: server-id = 1 log_bin = /var/log/mysql/mysql-bin.log replicate-do-db = some_project_production replicate-do-db...

...other_project_production replicate-ignore-db = mysql server-id needs to be unique among all connected master and slave servers. When replicate-do-db is provided only the chosen databases...

# the value from the form field's ngModel (which means it's not sent to the # server, and old values would not be overwritten). # # This directive makes sure that...

...form fields with an invalid value return an # empty string instead of undefined. for elementType in ['input', 'textarea', 'select'] @app.directive elementType, -> priority: 1 restrict: 'E' require: '?ngModel' link: (scope, element...

...file download links in an end-to-end test can be painful, especially with Selenium. The attached download_helpers.rb provides a download_link method for your Capybara tests. It returns a...

details[:disposition] # => 'attachment' or 'inline' details[:filename] # => 'report.txt' details[:text] # => file content as string details[:content_type] # => 'text/plain' Features Compared to other approaches this helper has many useful features...

...unwrap(). Here is how. Consider the following example element. $container = $(' Hello World ') Let's say we want to discard any tags, but keep their contents. Simply find them, then dive...

When using state_machine you sometimes need to know whether an object may execute a certain transition. Let's take an arbitrary object such as a blog article as an...

...example that has those states: A -> B -> C -> D Additionally, you have transitions between the states as shown above. Let's call the transition between 'A' and 'B' transition_ab...

...exactly(building, other_building) expect(unit.assignable_buildings).not_to include(unauthorized_building, nil) end ... See RSpec: Where to put custom matchers and other support code

...alias such as this to your ~/.bashrc: alias recent-branch="git for-each-ref --sort=-committerdate --format='%(refname:short)' refs/heads/ | fzf | sed 's/\* //g' | xargs -I '{}' git checkout {}"

Now whenever you want to switch back and forth between your most recent branches, type recent-branch, select one and press enter...

...open a dialog with the route to your dialog's view. tinymce.init({ // ... toolbar: 'myCustomButton', setup: function(editor) { editor.ui.registry.addButton('myCustom Button', { icon: 'document-properties', tooltip: 'Further describe your button here', onAction...

...insertContent', content: linkTag, }); window.parent.postMessage({ mceAction: 'insertContent', content: ' ', }) window.parent.postMessage({ mceAction: 'close' }); }) function buildLinkTag(form) { // do stuff } }) See here for more commands...

Note: Making a reverse proxy with nginx is much more straightforward. A reverse proxy is a "man in the middle" server that tunnels requests to another server. You can use...

...makes sure that it can fetch from HTTPS internally. You've basically built your custom SSL-stripping MITM attack server. If your proxy server should be accessible over HTTPS, use...

If you are using scrum in a project you might be familiar with planning poker, a playful way to agree on story estimates. PoinZ is an online planning poker app...

A print stylesheet is easy to create. Choose a font suited for paper, hide some elements, done. Unfortunately print stylesheets often break as the application is developed further, because they...

...are quickly forgotten and nobody bothers to check if their change breaks the print stylesheet. This card describes how to write a simple Cucumber feature that tests some aspects of...

When your JavaScript bundle is so massive that you cannot load it all up front, I would recommend to load...

This is how you regain disk space from OpenStack instances if you are using kvm and qcow. If your instance used up all configured disk space once the disk file...

...remains big. You can end up in a situation where for example the instance use only 20GB disk space but the disk file on the server has 100GB (or even...

The need for clearfix hacks has been greatly reduced since we could layout with Flexbox or CSS Grid. However, when you do need a clearfix, there's no reason to...

...hack anymore. You can just give the clearing container display: flow-root. This is supported by all browsers except IE11...

...of control”. A function that accepts a callback instead of a return value is saying, “Don’t call me, I’ll call you.”. Promises un-invert the inversion, cleanly separating...

...the input arguments from control flow arguments. This simplifies the use and creation of APIs, particularly variadic, REST and spread arguments. Note that promises are not a drop-in replacement...

Sometimes, the rails dev server doesn't terminate properly. This can for example happen when the dev server runs in a RubyMine terminal. When this happens, the old dev server...

...blocks port 3000, so when you try to start a new server, you get the error: Address already in use - bind(2) for "127.0.0.1" port 3000 (Errno::EADDRINUSE)

RubyMine offers you to exclude directories from search, meaning faster search results and less "noise" in the list of result. Right-click a folder in your project tree and click...

...and other directories that you don't need to access during development and whose search results are irrelevant. They won't be deleted but simply ignored when searching across a...

Capistrano 2 brings the shell command which allows you to run commands on your deployment targets. There is also invoke to run a command directly from your terminal.

...allow running Capistrano tasks or shell commands, and scope to individual machines or machine roles. Unfortunately Capistrano 3 does not include these commands any more. cap shell Basics