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Neural Networks in Java, Backpropagation algorithm for layered networks

During the last few weeks I’ve been programming a lot, mostly in Java. Was my code efficient? I guess so. And it worked. What more can man want ? Beauty! l I needed was to change my programming style....

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T. Porter & T. Duff – Compositing Digital Images

If you don’t know yet ( is that possible?) what Porter and Duff operators are, this is the best place to start.

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Mixing stdio with iostream

When mixing C stdio and C++ iostream synchronization problems can occur because the two libraries use different buffering strategies. This seems a major drawback since mixing C++ code with C libraries...

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Exception handling in constructor’s initialization list

There are some aspects of C++ syntax that still amaze me… The syntax for catching an exception in an initialization list is one of them.It’s totally awkward class MyClass { public: MyClass() try :...

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Howto Get Direct YouTube Video (FLV) URL

This post is based on paulg’s description of  Youtube video url protocol . Time is precious, so let’s get straight to the point – here’s the Python implementation import httplib,urllib video_id =...

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Math Definitions

Mathematics is made of 50 percent formulas, 50 percent proofs, and 50 percent imagination. An engineer thinks that his equations are an approximation to reality.A physicist thinks reality is an...

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Math Jokes

A physicist, a mathematician and a computer scientist discuss what is better: a wife or a girlfriend. The physicist: “A girlfriend. You still have freedom to experiment.” The mathematician: “A wife....

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Joke

An American visiting in England asked at the hotel for the elevator. The portiere was a bit confused, but then smiled when he realized what the man wanted. “You must mean the lift,” he said. “No,” the...

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The devil’s offer

The devil visited a lawyer’s office and made her an offer. “I can arrange some things for you, ” the devil said. “I’ll increase your income five-fold. Your partners will love you; your clients will...

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Why complexity matters

I needed a simple queue class – so  I wrote one based on java.util.Queue interface ** * Queue Template Class * @author: Jarek Przygódzki <jarek.przygodzki@gmail.com> * @version 0.1 **/ class...

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