CSC/ECE 517 Fall 2007/wiki1b 6 aa

Take a case of the Singleton pattern and implement it as succinctly as possible in Ruby and Java.Compare the two implementations in terms of clarity and succinctness.The example should be a "real-world" example. While it may be grossly oversimplified for the purpose of illustration, it should not be totally contrived (i.e., should not raise the question, Why would anyone ever want to do that?).

http://www.beginner-java-tutorial.com/singleton.html http://www.ruby-doc.org/stdlib/libdoc/singleton/rdoc/index.html

Singleton Pattern

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--Xgao2 17:40, 30 September 2007 (EDT) Example Let's take the example of the Earth. There is only one earth object for the class of Earth, because we only have one earth. The currentCondition describe the earth's current condition.

Ruby Implementation

require 'Singleton'

class Earth
include Singleton
attr_accessor :currentCondition
end