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TL; DR; This article describes how to refactor and improve readability of complex data processing with syntax similar to Haskell do-notation and State monad. Motivation Latest project I’ve been involved in deals with a lot of data processing.Typical case was a method that receives a data chunk and chains it …
This article is about gotchas you should be aware of while building your API with Ruby on Rails. Controller tricks: API on Metal Sooner or later each Rails developer come to a point when he wants to build his first API.Among the first things you have to take care of …
When you are dealing with emails on a large scale, sometimes you need an SMTP server which silently swallows all your test emails.You don’t really want to test them because your application sends them like hundreds per minute. If it sounds familiar to you – then congratulations!Recently Mailtrap got a …
Recent 3.2.9 release bugfix has brought an issue for through associations.inverse_of usage can solve the problem only partially (polymorphic associations are still affected). UPDATE: patch that introduced this issue has just been reverted in rails master. Few days ago Rails 3.2.9 was released.Among the bugfixes a fix for through associations …
A few days ago my patch with the beginning_of_week config option has been merged to Rails master, so starting from Rails 4.0 we’ll gain full control over the week start day. Preface Working on Interstellar, I’ve found out thatActiveSupport has a lot of useful methods like Date#beginning_of_week, Date#end_of_week and many …
The Mailtrap Feed Me campaign has started – share your fail story and win an iPad or other prizes! Have you ever used your production database in staging or development environments just to fix some tricky bug and make sure everything works as expected.Hell yeah, we all do this right?But …
My Enumerable::Lazy patch was accepted into ruby trunk few days ago. So, in ruby 2.0, we can go like this: