This page is an adaptation and extension of Jakub Suder's Pragmatic Forums post:
http://forums.pragprog.com/forums/76/topics/687

=== In !MacRuby ===

!MacRuby supports new parameter syntax:

{{{
  menu.addItemWithTitle(“Speak”, action: “speak:”, keyEquivalent: ’’)
}}}

The prefixes {{{OSX::}}} and {{{include OSX}}} are unnecessary,
because everything is defined on the main object.

There is no need to explicitly subclass {{{NSObject}}},
because all classes inherit from it by default.

Use {{{framework “Cocoa”}}}, instead of {{{require “osx/cocoa”}}}. 

{{{ib_outlet}}} and {{{ib_action}}} are deprecated.
To set outlets, use standard {{{attr_writer}}} or {{{attr_accessor}}} calls.
To define actions, simply define methods that accept one argument named {{{sender}}}. 

In example 3.3: using {{{speak}}} or {{{speak_}}} as the selector name doesn’t work;
only {{{speak:}}} works.

There’s no {{{objc_methods}}} method.
However, calling {{{methods}}} passing the second parameter as true
will return the list of Objective-C methods that the receiver responds to.