Sometimes modern Javascript projects get out of hand. A major culprit in this can be the messy handling of asynchronous...
before(:all) runs the block once before all of the examples. before(:each) runs the block once before each...
Scope is all about where something is visible. It’s all about what (variables, constants, methods) is available to you...
You should prefer native promises to jQuery's Deferreds. Native promises are much faster than their jQuery equivalent. Native promises...
Native promises have no methods to inspect their state. You can use the promiseState function below to check whether a...
You can use local copies of gems in your Gemfile like this: gem 'spreewald', path: '~/gems/spreewald' As soon as you...
rack-cargo gives your API a new /batch route that lets clients perform multiple API calls with a single request...
Sometimes you add Paperclip image styles, sometimes you remove some. In order to only keep the files you actually need...
In the ruby shell (IRB) and rails console the return value of the previous command is saved in _ (underscore). This...
ImageMagick can automatically crop surrounding transparent pixels from an image: convert input.png -trim +repage output.png
I often see the use of || to set a default value for a variable that might be nil, null or...
ActiveRecord::RecordNotFound errors provide quite meaningful error messages that can provide some insight on application details. Consider the following:
Put the line below in the respective env.rb file to make your action controllers raise an ActionController::UnpermittedParameters error when...
First, go to the webinterface of your phone. Choose Software Update in the navigation on the left. Next, you have...
You can configure a Ubuntu system as a gateway in order to share it's internet connection (maybe via WLAN...
select2 is a great jQuery library to make (large) fields more usable. For Bootstrap 3 there is select2-bootstrap-theme...
Capistrano has the concept of a "rollback" that comes in really handy in case of errors. When you notice that...
Webpack is the future. We're using it in our latest Rails applications. For tests, we want to compile assets...
I needed to make sure that an element is visible and not overshadowed by an element that has a higher...
When storing a file with Carrierwave, it is always cached prior to actually storing it (to support form roundtrips).
This card will show you a cool way to define a class using Struct.new. A common usecase for Structs are...
If you use the Better Errors gem, you will sometimes notice that it can be very slow. This is because...
When using GROUP BY, MySQL now complains if the SELECT includes columns which are not part of the GROUP BY...
Nowadays it is fairly easy to intercept and modify mails globally before they are sent. All you have to do...