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Example for boost shared_mutex (multiple reads/one write)?

I have a multithreaded app that has to read some data often, and occasionally that data is updated. Right now a mutex keeps access to that data safe, but it's expensive because I would like multiple threads to be able to read simultaneously, and only lock them out when an update is needed (the updat...
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iOS application: how to clear notifications?

...onBadgeNumber: 0]; to clear said notifications. It might seem a bit weird, and Apple might provide a more intuitive way to do this in the future, but for the time being it's the official way. Myself, I use this snippet: [[UIApplication sharedApplication] setApplicationIconBadgeNumber: 0]; [[UIAppl...
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C++: Rounding up to the nearest multiple of a number

OK - I'm almost embarrassed posting this here (and I will delete if anyone votes to close) as it seems like a basic question. ...
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How do I fit an image (img) inside a div and keep the aspect ratio?

I have a 48x48 div and inside it there is an img element, I want to fit it into the div without losing any part, in the mean time the ratio is kept, is it achievable using html and css? ...
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How to manually set an authenticated user in Spring Security / SpringMVC

.... This code is used within a Spring Webflow flow, hence the RequestContext and ExternalContext classes. But the part that is most relevant to you is the doAutoLogin method. public String registerUser(UserRegistrationFormBean userRegistrationFormBean, RequestContext reque...
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Ruby on Rails Server options [closed]

...lication confuses me. There are WEBrick, Mongrel, Passenger, Apache, Nginx and many more I am sure, and I don't really understand the different roles they play. ...
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Excluding files/directories from Gulp task

I have a gulp rjs task that concatenates and uglifies all my custom .JS files (any non vendor libraries). 2 Answers ...
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Decimal separator comma (',') with numberDecimal inputType in EditText

... A workaround (until Google fix this bug) is to use an EditText with android:inputType="numberDecimal" and android:digits="0123456789.,". Then add a TextChangedListener to the EditText with the following afterTextChanged: public void afterTextChanged(Editable s) { double doubleValue = 0...
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Can you delete multiple branches in one command with Git?

... be suitable output, while git branch has pretty output with things like * and -> (for symrefs) which can mess you up in scripts/one-liners. – Cascabel Sep 8 '10 at 23:05 3 ...
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GitHub: make fork an “own project”

...t it seems the original author hasn't got the time to review these changes and include them. In fact, it is even possible that the features I need and implemented are not in the vision of the original author and we simply aim at different goals. I don't know as I never got responses from him. ...