Archive for January, 2008

What is a ruby symbol? – symbols explained

Many programmers who are new to Ruby get confused when they see Ruby symbols. A lot us came to know about Ruby language through Ruby on Rails projects. In Ruby on Rails, symbols are everywhere! So it is essential to understand the concept of symbols in Ruby. A symbol in Ruby is an instance of […]

Using temporary files in Ruby – Tempfile.new

For certain programming solutions, you might need a temporary file. Different operating systems store temporary files in different locations. Also you don’t want to explicitly name the file since that is irrelevant in the program. How do you ensure that there are no filename conflicts? The solution for all these is to use library for […]

A Quick Dose of Ruby History

When you are learning something new, the first thing you should check out is its history. When you go through the history, you get a better perspective. It is the same with Ruby language and hence let us get a quick dose of Ruby history. Ruby programming language is created by a Japanese programmer, Yukihiro […]

Using Ruby’s http library – download and process web pages – I

Ruby has excellent networking support. Ruby has low level networking features such as sockets and tcp/ip protocols. It also has a high level API for handling protocols such as http and ftp. In this post we will look the Ruby http library. We also look at how this library can be used to download and […]

Rails controversy – Zed Shaw gets Dreamhost support!

All hell broke loose after Zed Shaw (the guy behind Mongrel) wrote a post claiming Rails is Ghetto. In the post he points out the ugly part of “Rails Community”. “This is that rant. It is part of my grand exit strategy from the Ruby and Rails community. I don’t want to be a ‘Ruby […]

Advanced Ruby – Dynamic code execution

One of the advanced features of Ruby, which is behind the success of rails is the dynamic code execution. Code fragments can be executed using eval method. This is very similar to JavaScript eval function. following is an example, eval executes the code in the current context. It is also possible to execute the code […]

Interacting with Ruby’s runtime environment

In this post I will look at various ways of interacting with a Ruby program’s runtime environment. Following sample program has methods to identify the operating system platform, environment variables in the OS and finding out the command line parameters.

CSV processing in Ruby

Ruby is a relatively young language. One of the advantages with this is that Ruby has libraries for common programming needs. In this post, I will show you how easy it is to process CSV files in Ruby. A CSV file contains comma separated values and is an easy way to store information in text […]