I'm a developer, math enthusiast and student.

Dhaivat's articles

  1. Sorting Algorithms in Ruby

    The point of understanding sorting algorithms has very little to do with the actual act of sorting. Rather, the different algorithms are great examples of various techniques that can be applied to large set of problems. In this article, we’ll take a look at some of these algorithms and the underlying ideas, as well as implementations in Ruby.

  2. Machine Learning: Ruby and the Naive Bayes Theorem

    We’ve all heard of the “Big Data” trend in computer science: everyone and their grandmother is trying to garner insights from large datasets. Often, the tool for the job is machine learning. A large portion of the Ruby community revolves around web development; even here, some basic machine learning knowledge can come in handy when applied creatively. This article will get you up to speed with a simple (but often quite effective) machine learning technique: the Naive Bayes Classifier.

    We’ll go through the underlying theory, which does require some math background but not too much. Then, we’ll build a reusable implementation of the classifier and work it through an example dataset.

  3. Dynamic Programming with Ruby

    This article will give you a taste of a common algorithm design technique called “dynamic programming” by exploring two different problems and presenting solutions in Ruby. It turns out that dynamic programming is actually a very versatile approach that can be applied to all sorts of problems in a ton of disciplines.

  4. Drawing with Processing and Ruby

    Processing is an environment/programming language that is meant to make visual, interactive applications extremely easy to write. It can be used for everything from teaching children how to code to visualizing scientific data. Fortunately, all of this goodness is no longer bottled up inside Processing anymore; you can use it from Ruby! In this article, […]

  5. Choosing the Right Serialization Format

    When saving or communicating some kind of information, we often use serialization. Serialization takes a Ruby object and converts it into a string of bytes and vice versa. For example, if you have an object representing information about a user and need to send it over the network, it has to be serialized into a set of bytes that can be pushed over a socket. Then, at the other end, the receiver has to unserialize the object, converting it back into something that Ruby (or another language) can understand.

    It turns out that there are lots of ways to serialize Ruby objects. I’ll cover YAML, JSON, and MessagePack in this article, exploring their pianos and fortes to see them in action with Ruby. At the end, we’ll put together a modular serialization approach using some metaprogramming tricks.

  6. Elegant Network Communication with RabbitMQ

    Network communication is fundamental to tons of applications, but it is very difficult to get right. Dealing with traditional sockets (TCP, UDP, etc.) is frustrating because the concepts associated with them are too low level for a lot of the work that we do. For example, sockets are operated as streams, meaning that you have come up with your own way to distinguish between packets of information.

    This is one of the gaps that messaging systems fill. They make writing networked applications much easier by providing message-based, rather than stream-based, communication. That means instead of having to read from a seemingly never-ending stream of information, you get your information nicely packaged as messages. In addition, messaging systems allow us to easily design complex network topologies with “queues” in the middle (more on that later).

    In this article, we’ll explore RabbitMQ. We’ll take a look at its underlying concepts and how it compares to other message queuing systems. Also, the article will cover how to use “Bunny”, the gem that lets Ruby developers interact with RabbitMQ.

  7. Agent: Go-Like Concurrency in Ruby

    ruby-go

    Concurrency and parallelism are hard. With the traditional threading model, a developer has to constantly ensure threads are not in conflict, which is a very difficult task. The team behind Go implemented fantastic concurrency primitives within the language that make reasoning about concurrent code far easier.

    Fortunately, all that goodness is no longer locked up inside Go; there’s now a library for Ruby! It’s called “Agent” and it implements the Golang-concurrency magic in Ruby.

  8. Go for Rubyists, II

    In this article, we’ll be looking through some more of Go’s features through a Ruby lens. In case you missed it, you can find Part I here, although you don’t have to read it to understand this article. We’ll be running through Go’s answer to traditional OOP strategies (e.g. inheritance). Go essentially eliminates traditional inheritance […]

  9. Go for Rubyists

    The great folks over at Google have developed an awesome language called Go. At first glance, it seems like Ruby and Go are distant cousins, at best. However, their complementary skill sets provide a perfect match. It is definitely worth any Rubyist’s time to take a look at Go as some of the innovations it […]

  10. Introduction to Thor

    Looking at RubyGem’s list of “Most Downloaded” gems, we notice lots of familiar names: “rake”, “rails”, “rack”, “actionmailer”, etc. But, “thor” is an exception; few of us have heard of it and even fewer have written code with it. So, what exactly is Thor? It is a way to write powerful command line utilities in […]