Time difference in Ruby on Rails

How many minutes has passed since the beginning of this job? How many hours do we have to wait? If you’ve asked these kind of questions while programming on Ruby on Rails you’ll probably get no answer on Rails docs. But there is a solution.

Using helper methods inside your controllers

Have you ever needed to use a helper method inside your controller? I did, a few…

How to compare version strings in Ruby

Sometimes you need to support different versions of an API inside your ruby code. And, sometime, you will need to compare version strings in order to make a feature available.

Be aware of time operations when using cache with expires_in

A little string formatting tip and how we handle dynamic email subjects

If you are used to format string via % operator you should be careful with dynamic content evaluation. Here is how I handle special cases when using dynamic e-mail subjects.

Ordering by nulls on Postgres

By default Postgres will order by ASC and NULL values will be placed on the end of list, but with the NULLS {FIRST|LAST} option you can setup the ordering by NULL values as you wish: