Ruby is a fully object-oriented language, much like the classic object-oriented language, Smalltalk. Like Smalltalk, it is dynamically typed (as opposed to Java or C++), but unlike Smalltalk, Ruby features the same conveniences found in modern scripting languages, making Ruby a favorite tool of intelligent, forward-thinking programmers and the basis for the Rails web framework. This is the reference manual for Ruby, including a description of all the standard library modules, a complete reference to all built-in classes and modules (including all the new and changed methods introduced by Ruby 1.9). It also includes all the new and changed syntax and semantics introduced since Ruby 1.8. Learn about the new parameter passing rules, local variable scoping in blocks, fibers, and the new block declaration syntax, among other exciting new features.

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Dave Thomas and Andy Hunt are The Pragmatic Programmers. They are authors of the seminal book, The Pragmatic Programmer: From Journeyman to Master, and have since written more best-selling and award-winning books. Andy and Dave speak at clients and conferences around the world, and their publishing company, the Pragmatic Bookshelf, continues producing books that help software developers stay on the top of their game.Chad Fowler is co-director of Ruby Central, Inc., and remains an active, driving force in the Ruby community. Andy Hunt is a programmer turned consultant, author and publisher. He co-authored the best-selling book The Pragmatic Programmer, was one of the 17 founders of the Agile Alliance, and co-founded the Pragmatic Bookshelf, publishing award-winning and critically acclaimed books for software developers.

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