Passing on knowledge about software development and other related technologies.
Arrays are objects (remember everything is an object in Ruby) that can store multiple values such as numbers or strings. Simplified, an array is a collection or list of things. Arrays are generally used to hold a collection of data that needs to be displayed or manipulated by your program. Their data can come from any source, user input, databases, or computed values. In Ruby (like many other languages), arrays are ordered, integer-indexed collections of any type object. This means that each element in an array is associated with and referred to by an ... Continue reading
Many times when writing complex ruby applications or using frameworks (like Rails, Sinatra, or others) you end up having several processes that have to be running during development to allow it to run such as web services, message queues, or some other type of process. Foreman allows you to manage these different processes under one management gem. Foreman uses a file called Procfile.
First, let's setup the Procfile. A Procfile is a list that contains a name to identify the process and the command used by the system to run it. Foreman ... Continue reading
My favorite projects are when I get to find solution to small problems for clients and solve them quickly for them. This week I had a client that needed some Text To Speech (TTS) capabilities on a small Linux system in their shipping department. Easy enough right? After a little research I found some really simple code example of TTS on Rosetta Code that someone had contributed that would work on Windows, Linux, and a Mac.
After updating the example code to work with Ruby 2.3, I did a bit of re-factoring and customizing ended up with a pretty cool little command-line utility that... Continue reading
On a recent project we had the task of solving a physical routing problem in a large warehouse, also know as The Traveling Salesman Problem (TSP). The TSP in a nutshell is this: Given a list of physical locations (cities,addresses, etc) and the distances between each pair of them, what is the shortest possible route that visits each location exactly once and returns to the starting location?
Sounds simple for our complex brains to plot this out, but not so simple for a computer program. Enter Artificial Intelligence, specifically Genetics Algorithms in Ruby using the AI4R gem wri... Continue reading