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Channel: Guy Ellis Rocks: Algorithms
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Casting Out Nines

I'm working on a project at the moment that involves the verification of credit card numbers. This has led to running checksums on the numbers to validate them including Luhn's algorithm.Simply stated,...

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Are there enough credit card numbers?

I was wondering if the 16 digits that most credit cards have (VISA and Mastercard et al) if you don't include American Express' 13 digit cards were enough for the world or if we'd run out of digits at...

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Text Classification References

I'm currently working on a text classification system. This is requiring a fair amount of research and background reading so I'm going to create a list of references that I'm using:A Plan for Spam by...

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Training a text classifier

When writing a text classification system you need to train it. Typically you have a corpus of good data that has been accurately pre-classified and this is what you throw at the system while it is...

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Factorial Function in C#

 The Factorial Function is a classic interview question. It opens the doors to a discussion about stack overflow (if done recursively) and integer overflow (if the param is too large) as well as...

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