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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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Printing leading 0's in C?

I'm trying to find a good way to print leading 0's, such as 01001 for a zipcode. While the number would be stored as 1001, what is a good way to do it? ...
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Most used parts of Boost [closed]

When I discovered boost::lexical_cast I thought to myself "why didn't I know about this sooner!" - I hated having to write code like ...
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Conditional Variable vs Semaphore

When should one use a semaphore and when should one use a conditional variable (CondVar) ? 6 Answers ...
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How to step through Python code to help debug issues?

In Java/C# you can easily step through code to trace what might be going wrong, and IDE's make this process very user friendly. ...
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How to display an unordered list in two columns?

... the following HTML, what is the easiest method to display the list as two columns? 15 Answers ...
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What is the difference between float and double?

I've read about the difference between double precision and single precision. However, in most cases, float and double seem to be interchangeable, i.e. using one or the other does not seem to affect the results. Is this really the case? When are floats and doubles interchangeable? What are the d...
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How to remove selected commit log entries from a Git repository while keeping their changes?

I would like to remove selected commit log entries from a linear commit tree, so that the entries do not show in the commit log. ...
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How to insert an item into an array at a specific index (JavaScript)?

I am looking for a JavaScript array insert method, in the style of: 19 Answers 19 ...
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Registry Key '…' has value '1.7', but '1.6' is required. Java 1.7 is Installed and the Registry is P

My development team recently was forced over to a remote development environment where we do not have full access to the servers. Before the change over we had a JAR that was running fine on Java 1.7 x64 along with JRE 7. When we moved over to the new server our JAR was running alright, but then o...