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Creating activity feeds in PostgreSQL 9.5 – Chaps

https://blog.chaps.io/2016/05/18/creating-activity-feeds-in-postgresql.html

Creating activity feeds in PostgreSQL 9.5. May 18th, 2016. Ever since creating PublicActivity. In 2011, other developers suggested multiple enhancements and features. But only one of them proved to be a big challenge: grouping activities the way Facebook or Instagram do. Main reason was the fact that PublicActivity supports very different databases (from PostgreSQL to MongoDB), so delivering a uniform solution for all of them was impossible. Let’s start by creating tables. First, users:. Polymorphic colu...

blog.chaps.io

Upgrading PostgreSQL from 9.4 to 9.5 on Ubuntu 15.10 – Chaps

https://blog.chaps.io/2016/02/08/upgrading-postgresql-from-9-4-to-9-5-on-ubuntu-15-10.html

Upgrading PostgreSQL from 9.4 to 9.5 on Ubuntu 15.10. February 8th, 2016. Now that PostgreSQL 9.5 came out with even more awesome features, it’s time to upgrade! Since upgrading from 9.4 might be a bit of a hassle if we used official Ubuntu repositories before, I decided to write a short guide to help with the process. Before we proceed it is very important to back up your current cluster. If you are using APT repositories from PostgreSQL just install the. Otherwise follow the steps below. Before you pro...

blog.chaps.io

Running concurrent workflows in Ruby – Chaps

https://blog.chaps.io/2016/02/01/running-concurrent-workflows-in-ruby.html

Running concurrent workflows in Ruby. February 1st, 2016. Have you ever struggled with a chain of rake tasks that needed to be run periodically and their runtime was giving you a headache? Did you ask yourself how to save time by boosting execution along with readability for huge chunks of jobs? These questions are very common when it comes to applications with hefty amount of background processing jobs. If they don’t depend on each other I can’t really see any obstacles to parallel execution. The former...

blog.chaps.io

Generating quines in Ruby – Chaps

https://blog.chaps.io/2015/10/01/generating-quines-in-ruby.html

Generating quines in Ruby. October 1st, 2015. Quines are a very interesting concept in computing as they are self-replicating programs. Let us start with describing what exactly is a. Ndash; it is a program that prints its own source code, usually to the standard output. It has to store its source code in itself (it cannot rely on the source file laying around on the file system). For example, this program matches the first requirement, but it does not match the second. This is not exactly what we want&#...

blog.chaps.io

Creating a BitTorrent client in Haskell #1 – Chaps

https://blog.chaps.io/2015/10/05/torrent-client-in-haskell-1.html

Creating a BitTorrent client in Haskell #1. October 5th, 2015. This is the first post in a series on writing a BitTorrent client in Haskell. BitTorrentProtocol version 1.0. Protocol description on wiki.theory.org. I find this one a better introduction to the first steps. Before we dive deep into managing connections and actual protocol logic, let us first make sure that we speak the data exchange protocols. This post will be all about that. The first one is called. And is used for. The number is encoded ...

blog.chaps.io

Role-based authorization in Rails – Chaps

https://blog.chaps.io/2015/11/13/role-based-authorization-in-rails.html

Role-based authorization in Rails. November 13th, 2015. For many years, almost every Rails project I started included CanCan, the most popular authorization gem by Ryan Bates. It was very easy to use in applications built from scratch as well as to include in existing projects. To make things even better, it left the programmer a lot of room for customization. However, after working on dozens of Rails projects using CanCan, I started to notice some uncomfortable patterns. I noticed is the use of. Solves ...

blog.chaps.io

Creating a BitTorrent client in Haskell #3 – Chaps

https://blog.chaps.io/2015/11/24/torrent-client-in-haskell-3.html

Creating a BitTorrent client in Haskell #3. November 24th, 2015. In the previous post. I laid down foundations for PeerMonad, where most of the protocol logic will live. This article will focus on using that towards our goal – downloading files. Let’s quickly recap the first actions our client takes. First, it asks the tracker for peers, then it initiates connections to all of them and enters peer loops. Conceptually, our peer loop boils down to this:. You might recall from the first post. Dictionary&#46...

blog.chaps.io

Creating a BitTorrent client in Haskell #2 – Chaps

https://blog.chaps.io/2015/10/13/torrent-client-in-haskell-2.html

Creating a BitTorrent client in Haskell #2. October 13th, 2015. In the previous post. I went over the protocols and file formats required for the BitTorrent protocol. This article will focus on laying down a strong foundation for our future efforts. To ease into our main topic gradually, let’s first do something simple, like asking the tracker for peers. This will be an HTTP request. It usually goes to. But the exact URL is stored in MetaInfo. For reference, all the options are documented here. First, we...

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GitHub - chaps-io/public_activity: Easy activity tracking for models - similar to Github's Public Activity

https://github.com/pokonski/public_activity

Easy activity tracking for models - similar to Github's Public Activity. Https:/ github.com/pokonski/public activity. Use Git or checkout with SVN using the web URL. Jul 19, 2016. Fix incorrect file name to include test helpers in. Fixes. Failed to load latest commit information. Make sure all Gemfiles use the same MiniTest version. Jul 9, 2014. Mar 17, 2016. Mar 17, 2016. Fix missing attr accessible for AR 4.0. Jul 17, 2013. Added bundler caching and fast finish support to travis build matrix. Describin...