Devoxx 2008 Tutorial

JRuby in ActionRuby, Rails, GUIs, and More Except where otherwise noted, the content of this presentation is licensed under the Creative Commons Attribution­Share Alike 3.0 United States License (http://creativecommons.org/licenses/by­sa/3.0/us/).The JRuby Guys● Charles Oliver Nutter and Thomas Enebo● JRuby for 4+ years● Sun Microsystems for 2+ years● JVM languages Ruby● Dynamically typed● Pure object-oriented● C-language implementation● Green threads● “Fast enough” == “a bit slow”● 1.8.6/7 is current● 1.9 in development● Focus on performance, character encodings JRuby● Ruby on the JVM● Nearly complete Ruby compatibility● Interop with Java libraries● Improvements on original● Native threading● Faster by most measurements● 1.1.6 this week (RC1 out now)● 1.8.6 compatible, 1.9 in progress Ruby Tutorial● Walkthrough of all the key Ruby features● Interactive! Please jump in with questions● Free-form, live-coded● Ruby is fun, Ruby tutorial should be fun! ModulesObjectMyGreatClassclass MyGreatClass < Object …end ModulesObjectMyGreatModuleMyGreatClassclass MyGreatClass < Object include MyGreatModuleend ModulesClassclassObject Objectclass meta classMyGreatClass MyGreatClassclass meta classclass MyGreatClass < Object extend MyGreatModuleend ModulesObjectObject Meta classMyGreatModuleMyGreatClassMyGreatClass Meta classclass MyGreatClass < Object extend MyGreatModuleend SingletonsObjectmy_object ...