You can configure RSpec 3.3+ to raise an error when attempting to stub or mock a non-existing method. We...
Sending a testmail from a server with a configured exim is easy as pie. From your usershell: tell exim that...
Ruby has a set of methods to convert an object to another representation. Most of them come in explicit and...
When you make a simple TCP connection to a remote server (like telnet), your client won't normally notice when...
If you get an error like: subprocess installed post-removal script returned error exit status 78 when installing/removing/updating a package...
You want to test your 1GE or 10GE internet uplink? We needed to ensure we have full 10GE to the...
When dealing with AR scopes, you can remove conditions, order, etc by using the unscope method. It is available on...
Redactor is yet another WYSIWYG editor. It definitely has its weak points, but I want to point out that it...
PostgreSQL's array data type is pretty useful, but manipulating values of arrays can be awkward because of its syntax...
Our applications not only need to be functional, they need to be fast. But, to quote Donald Knuth, premature optimization...
Some tasks in a web application are better not done live when a user request a page, but in the...
When a method has keyword arguments, Ruby offers implicit conversion of a Hash argument into keyword arguments. This conversion is...
Writing ruby methods that accept both optional and keyword arguments is dangerous and should be avoided. This confusing behavior will...
Starting with Ruby 1.9, most #each methods can be called without a block, and will return an enumerator. This is...
Rails 5 will introduce ActiveRecord::Relation#or. On Rails 4 and 3.2 you can use the activerecord_any_of gem...
I figure we needed a definitive reference for what work is triggered by changing various CSS properties. It's something...
As the web is being used for more and more tasks, expectations rise. Not only should web pages offer rich...
This is how you regain disk space from OpenStack instances if you are using kvm and qcow. If your instance...
Method lookup Understand all the terms in How Ruby method lookup works, in particular: include extend singleton class
With ngAnimate, you can easily animate certain events (see directive support). We'll make use of ngClass animations to style...
Understand how nested attributes appear in the params. See how the Rails form helpers encode the names of nested...
If you have problems installing a gem and get a error collect2: error: ld returned 1 exit status it's...
SitePrism gives you a simple, clean and semantic DSL for describing your site using the Page Object Model pattern, for...
If you need to upgrade code that uses the old jQuery methods bind, delegate, live, unbind and die, the attached...