November 2008
Intermediate to advanced
224 pages
5h 2m
English
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Preface
JRuby is just Ruby taking advantage of Java’s VM; taking the suck out of Java and putting some extra awesome into Ruby.
—Charles Nutter, JRuby project lead Twitter, August 7,
2008
And with that quote, Charles Nutter summarizes the two forces that have recently brought attention to the JRuby project: the recognition that Java provides a powerful platform that can be used by languages other than Java, and the increase in interest in the Ruby programming language. In the recipes ahead, we will explore a wide variety of usage scenarios for JRuby. In Charles’s terms, some recipes are about taking the suck out of Java, some are about putting some extra awesome into Ruby, and some are about both.
Audience
To fully leverage JRuby, you must be able to move freely between the Java and Ruby domains. In writing the JRuby Cookbook, we had in mind a reader with some understanding of both languages, possibly with a better understanding of one or the other. As a result, you won’t find a lot of basic introductory material, save for the first chapter where we illustrate the areas where Ruby and Java are similar as well as where they differ.
Our overall approach is that the purpose of the recipes in this book is not to educate you on some preexisting Java or Ruby capability, but instead to explain how to use JRuby within the context of, or as an enhancement to, these existing capabilities. For example, the recipes in the JRuby on Rails chapter are written for someone who has already created a (working) ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.