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Does the APNS device token ever change, once created?

... Apple's official documentation is unclear on this point. What I have observed is this: the token is invariant for a given device, application, and domain (production vs. sandbox). I believe that this must remain true in order for the system to work reliably. Consider the situati...
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Switch Git branch without files checkout

... Directly writing to the HEAD file is less dependable. What if you are in a subdir? For detached head (head pointing to SHA1 directly), try this: git update-ref HEAD refs/heads/otherbranch – Alexander Bird Jan 23 '13 at 20:25 ...
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Local dependency in package.json

... Could you explain a bit more what this does. i.e. if I setup a vscode project with multiple root folders (i.e. "multi-root workspace") , will it be able to reflect changes in the module folder immediately for the consuming projects ? - Is that what this ...
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Manually raising (throwing) an exception in Python

...[0], sys.exc_info()[1], sys.exc_info()[2] If you want to, you can modify what happens with your new raise - e.g. setting new args for the instance: def error(): raise ValueError('oops!') def catch_error_modify_message(): try: error() except ValueError: error_type, err...
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What are the differences and similarities between ffmpeg, libav, and avconv?

When I run ffmpeg on Ubuntu, it shows: 1 Answer 1 ...
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Best practice for storing and protecting private API keys in applications [closed]

...ey want to spend, how much worth is a delay before the keys are hacked, on what scale will any successful hackers distribute the keys, etc. Small pieces of information like keys are more difficult to protect than entire applications. Intrinsically, nothing on the client-side is unbreakable, but you ...
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Change the name of the :id parameter in Routing resources for Rails

...amp; 5 In Rails 4, the :param option was added, which seems to do exactly what you're looking for. You can take a look at the Rails 3 code compared to the Rails 4 code. Details You can easily implement this in your routes.rb file: # config/routes.rb resources :posts, param: :slug # app/control...
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What is the meaning of “this” in Java?

... @Joachim Thanks! I'm missing something fundamental about what it means to make a method static and how this. works. My understanding is that this. allows you to call a method or variable that is unique to the instantiated version of the class, allowing for another version of the m...
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Nearest neighbors in high-dimensional data?

...ip among the features that comprise your data (are they independent--i.e., what does the covariance matrix look like); and the coordinate space from which your data was obtained. If you have no prior knowledge of the distribution(s) from which your data was sampled, at least one (well documented a...
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How do I pass JavaScript variables to PHP?

...de... PHP code runs at the server side, and it doesn't know anything about what is going on on the client side. You need to pass variables to PHP code from the HTML form using another mechanism, such as submitting the form using the GET or POST methods. <DOCTYPE html> <html> <head...