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If you have already started playing with swift, you probably thought about how to include third party libraries into your project or how to distribute yours. Apple provides a mechanism to distribute code via frameworks (eventually, for iOS too), so making a custom framework, which will include both ObjC and Swift code is very easy. But let’s dig deeper and create a pure Swift module, like apple do

MVC is not sufficientEvery day iOS apps become more cumbersome and bulky, which makes MVC approach not sufficient. We are seeing more and more classes for different purposes: app logic extracts into services, models extends with decorators, view separates into partials and so on. And – what is more important – there are now a lot of dependencies that need to be managed somehow. Singleton is often

This article is about gotchas you should be aware of while building your API with Ruby on Rails. Controller tricks: API on MetalSooner 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 are your controllers. If you want your API to be fast (and I bet you do) then you should consider using ActionController::Metal. The

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 is present, and since 3.2.9 join model instances are b

Hello my dear friends. Today we will talk about PostgreSQL and most useful modules for this database.PostgreSQL is an object-relational database management system (ORDBMS). The main features of PostgreSQL are: database support of virtually unlimited size; powerful and reliable mechanisms for transactional replication; built-in extensible programming languages; inheritance; easy expandability by ex

My Enumerable::Lazy patch was accepted into ruby trunk few days ago. So, in ruby 2.0, we can go like this: a = [1,2,3,4,2,5].lazy.map { |x| x * 10 }.select { |x| x > 30 } #=> no evaluation a.to_a #=> [40, 50], evaluation performed - no intermediate arrays generated. Why?Ruby is awesome language, and while being an imperative one, still allows us to write an elegant, functional programming style co

TroubleThere are some cases when you may need to access application session in your tests: User signup or registration flow is too long.Application use another backend and store result into session.In each story you must repeat the same steps. You can actually use some shared code but it does not speed-up tests anyway. Nowadays if you want to access session in cucumber/capybara acceptance test you

What if you have several servers with different users, ssh-keys, and even port numbers? How to manage all this stuff flexibly ? This tutorial covers poorly documented Capistrano features for advanced servers and roles configuration. Many of them obtained via digging into Capistrano sources. This article covers following Capistrano topics: roles configurationserver configurationThe way HOSTS, ROLES

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