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...
Installing SSL certificates usually implies additionally using intermediate certificates. If one of them is missing, some SSL client implementations might...
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 browsers define window.event, which will return a copy of the "current" event. However, this is not defined by the...
The asset pipeline is one of Rails' two mechanisms how stylesheets, javascripts and images from your /assets folder are processed...
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...
This is a guide on how to effectively use Git when working on a feature branch. It is designed to...
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...
A fantastic guide for a dilemma facing any web-based product. Here’s a simple set of Yes/No questions that...
Article shows how to make a script that fakes one kind of content when printed with cat, but uses different...
To safely transport an arbitrary string within a URL, you need to percent-encode characters that have a particular meaning...
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
While debugging an intricate issue with failed HTTP requests I have come to appreciate the more advanced features of the...
With ngAnimate, you can easily animate certain events (see directive support). We'll make use of ngClass animations to style...