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Using arrays or std::vectors in C++, what's the performance gap?

In our C++ course they suggest not to use C++ arrays on new projects anymore. As far as I know Stroustroup himself suggests not to use arrays. But are there significant performance differences? ...
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Remove duplicate rows in MySQL

I have a table with the following fields: 25 Answers 25 ...
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SAML vs federated login with OAuth

What's the difference between SAML and federated login with OAuth? Which solution makes more sense, if a company wants to use a third-party webapp, and but also wants single sign-on and be the authentication authority? ...
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Method can be made static, but should it?

Resharper likes to point out multiple functions per asp.net page that could be made static. Does it help me if I do make them static? Should I make them static and move them to a utility class? ...
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How do you convert a jQuery object into a string?

How do you convert a jQuery object into a string? 12 Answers 12 ...
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What are the default access modifiers in C#?

What is the default access modifier for classes, methods, members, constructors, delegates and interfaces? 9 Answers ...
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Use of 'const' for function parameters

How far do you go with const ? Do you just make functions const when necessary or do you go the whole hog and use it everywhere? For example, imagine a simple mutator that takes a single boolean parameter: ...
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A variable modified inside a while loop is not remembered

In the following program, if I set the variable $foo to the value 1 inside the first if statement, it works in the sense that its value is remembered after the if statement. However, when I set the same variable to the value 2 inside an if which is inside a while statement, it's forgotten af...
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Can hash tables really be O(1)?

It seems to be common knowledge that hash tables can achieve O(1), but that has never made sense to me. Can someone please explain it? Here are two situations that come to mind: ...
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Encrypt & Decrypt using PyCrypto AES 256

I'm trying to build two functions using PyCrypto that accept two parameters: the message and the key, and then encrypt/decrypt the message. ...