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Singleton pattern is a well-known pattern in programming. Double-checked locking is an implementation of singleton pattern which is intended to be thread-safe. However it is found that this method is broken, unless memory barrier is used which may has problem of portability.
In this article, I am going to present an alternative to double-checked locking ...
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Unblock me is a puzzle game in iphone. It's originated from rush hour. I am interested in solving the board game using computer. I can enter the board configuration into the computer one by one, but I would like to do it automatically. With image processing capatibability in Mathematica, the process can be done rather easily by taking screenshot.
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A package is released as open source project in GoogleCode/MathOO-packages. The aim of the project is to provide basic utilities and basic classes using MathOO, so that you can use it in an object oriented way. In the initial release, 1.0b, a dictionary class (associated array) is provided.
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Code is provided to benchmark the performance of MathOO.
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It is a documentation of MathOO, listing most of its functions and usage.
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Mathematica is a very useful software in many science fields. It supports procedural programming and functional programming. However, it does not support the modern object oriented programming. If you would like to add that, there is a package called Objectica, and it will cost you quite a fortune ($1000 on 3/11/2010).
Here I have developed a Mathematica ...
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Joomgallery is a great extension of Joomla. You can make gallery, upload photos, or even product catalog easily. If you are using Joomgallery 1.5.5.5.2, you may experience problem that the configuration manager of it becomes a blank page. And this how-to teaches you how to solve the problem.
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This is a short how to about how to sum sin(n q) and cos(n q).
