Ruby is an easy to learn programming language, it was invented by a guy named Matz in Japan. Ruby is a free software and can be used by any one for zero cost. Ruby's popularity was initially confined to Japan, later it slowly trickled out to rest of the world. Things changed with the emergence of Ruby on Rails which is a popular web-development framework written with Ruby.
This open book is licensed under a GNU Free Documentation License (GNU FDL). You can download I Love Ruby ebook for free in PDF format (6.4 MB).
Table of Contents
Comparison and Logic
Hashes and Symbols
Classes & Objects
Breaking large programs
Struct and OpenStruct
Ruby Style Guides
Modules and Mixins
Date and Time
Proc, Lambdas and Blocks
Test Driven Development
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