In this chapter, we walked through the basic components that comprise the Ruby File class and also reviewed the list of options that you can use when creating or adding to files. We analyzed how you can read the contents of files into Ruby programs by utilizing the read method. We also examined how to iterate over each line in a file and perform operations on each line. We learned how to delete files in Ruby. However, you should be careful while using this command as you don't want to accidentally delete a file. Remember, Ruby offers no warning whatsoever before deleting, so make sure you use it carefully. This chapter also walked you through the commands for appending content to the end of a file. Appending content to the end of a file is a great way of adding persistence to a Ruby program, without having to integrate a full database such as PostgreSQL or MySQL....
Comprehensive Ruby Programming
By :
Comprehensive Ruby Programming
By:
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)
Preface
Free Chapter
Introduction to the Ruby Programming Language
Ruby Variables
Ruby Strings
Working with Numbers in Ruby
Ruby Methods
Ruby Iterators and Loops
Ruby Collections
Ruby Conditionals
Object-Oriented Programming in Ruby
Working with the Filesystem in Ruby
Error Handling in Ruby
Regular Expressions in Ruby
Searching with grep in Ruby
Ruby Metaprogramming
Ruby Web Frameworks
Working with APIs in Ruby
Ruby Algorithms
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