Book Image

Comprehensive Ruby Programming

By : Jordan Hudgens
Book Image

Comprehensive Ruby Programming

By: Jordan Hudgens

Overview of this book

Ruby is a powerful, general-purpose programming language that can be applied to any task. Whether you are an experienced developer who wants to learn a new language or you are new to programming, this book is your comprehensive Ruby coding guide. Starting with the foundational principles, such as syntax, and scaling up to advanced topics such as big data analysis, this book will give you all of the tools you need to be a professional Ruby developer. A few of the key topics are: object-oriented programming, built-in Ruby methods, core programming skills, and an introduction to the Ruby on Rails and Sinatra web frameworks. You will also build 10 practical Ruby programs. Created by an experienced Ruby developer, this book has been written to ensure it focuses on the skills you will need to be a professional Ruby developer. After you have read this book, you will be ready to start building real-world Ruby projects.
Table of Contents (20 chapters)

Developing a custom error logger in Ruby

In this guide, let's wind up error handling in Ruby. In the previous guides, we first looked at the basic error handling syntax and followed that up with a better way to manage errors effectively. In this guide, we will see how we can handle errors in a production application.

We are going to create a method called error_logger, which will be responsible for appending all the errors that occur in our program into a log file. Let's create a file called error_log.txt. It's an empty file to which we will be adding more data.

This is what our error_logger method will look like:

def error_logger (e) 
File.open('error-handling-lessons/error_log.txt', 'a') do |file|
file.puts e
end
end

In this code, we are opening the error_log.txt file in the append mode and printing the error message into it. This method...