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This makes them ideal choices for rapid development and prototyping.

Additionally, Objective-C, Ruby and Python share many common concepts and design choices. Ruby and Objective-C in particular, were both heavily influenced by Smalltalk.

For example, to update the current version of Rails, just type: However, if you're like me, the thought of wildly upgrading your system libraries makes your stomach churn. This also makes rolling back to factory defaults quite easy. Leopard keeps built-in libraries in the /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/ folder. Just to be complete, Leopard stashes the Ruby Cocoa files in a third location: /System/Library/Frameworks/Ruby Cocoa.framework I highly recommend poking around in these directories–particularly the Ruby Cocoa header files.

The gems subfolder contains the actual libraries, while the doc subfolder contains both ri and html documentation. They can give you a good feel for the breadth of options available.

Still, I think this issue will smooth itself out with future updates.

Unfortunately, Cocoa seems to have a one-bridge-at-a-time rule.

Ruby Cocoa and Py Obj C already give us full access to the native Scripting Bridge, but I think this often becomes unwieldy.

We end up writing Ruby (or Python) versions of Objective-C calls on Apple Script APIs.

Fortunately, each language has its own library to simplify scripting: Ruby OSA for Ruby and py-applescript for Python.

Unfortunately, Leopard does not include these libraries. For the rest of this article will dig into the Ruby-specific additions to Leopard. Leopard carefully separates its pre-installed libraries from the user-installed libraries and updates.

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