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Virtual functions and performance - C++
...loop, so the additional overhead per call was 7 nanoseconds per function.
From this I conclude: yes, virtual functions are much slower than direct functions, and no, unless you're planning on calling them ten million times per second, it doesn't matter.
See also: comparison of the generated assemb...
Get Android Device Name [duplicate]
...eliable to use android.os.Build.MODEL and assume all mobile devices / tabs from all manufacturers will display the same info. You need to create your own list if you want to match device model to device name.
– ChuongPham
Apr 7 '13 at 4:09
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What is std::promise?
...td::future is an asynchronous return object ("an object that reads results from a shared state") and a std::promise is an asynchronous provider ("an object that provides a result to a shared state") i.e. a promise is the thing that you set a result on, so that you can get it from the associated futu...
How to enable CORS in AngularJs
...er you are making the request to has to implement CORS to grant JavaScript from your website access. Your JavaScript can't grant itself permission to access another website.
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Eclipse Kepler for OS X Mavericks request Java SE 6
... After this I had a the error "App can't be opened because it is from an unidentified developer", the following question has the solution: stackoverflow.com/questions/19551298/…
– Jonoabroad
Oct 31 '13 at 3:01
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How do I erase an element from std::vector by index?
...ents:
vector.erase( vector.begin() + 3, vector.begin() + 5 ); // Deleting from fourth element to sixth element
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Bash tool to get nth line from a file
...here's a Bash tool that specifically extracts a line (or a range of lines) from a file.
19 Answers
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Checkout multiple git repos into same Jenkins workspace
...e Multiple SCM plugin could help with this issue but it is now deprecated. From the Multiple SCM plugin page: "Users should migrate to https://wiki.jenkins-ci.org/display/JENKINS/Pipeline+Plugin . Pipeline offers a better way of checking out of multiple SCMs, and is supported by the Jenkins core de...
Why is a C++ Vector called a Vector?
... The same word is used for (e.g.) insects that transmit disease, and comes from the same Latin root as "vehicle". So it's something that takes you from one place to another. Incidentally, the word "matrix" is also from Latin, meaning "womb".
– Artelius
Jun 23 '...
Test if remote TCP port is open from a shell script
...ethod for properly testing if a given TCP port is open on a remote server, from inside a Shell script.
16 Answers
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