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How to detect a Christmas Tree? [closed]

... can be broken down into about 3 steps. First I apply a threshold (or actually, the logical "or" of two separate and distinct thresholds). As with many of the other answers, I assumed that the Christmas tree would be one of the brighter objects in the scene, so the first threshold is just a simple...
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How do I pass parameters into a PHP script through a webpage?

I am calling a PHP script whenever a webpage loads. However, there is a parameter that the PHP script needs to run (which I normally pass through the command line when I am testing the script). ...
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Make the current commit the only (initial) commit in a Git repository?

...e using submodules, you should use e.g. interactive rebase Step 1: remove all history (Make sure you have backup, this cannot be reverted) cat .git/config # note <github-uri> rm -rf .git Step 2: reconstruct the Git repo with only the current content git init git add . git commit -m "Init...
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Check if PHP session has already started

I have a PHP file that is sometimes called from a page that has started a session and sometimes from a page that doesn't have session started. Therefore when I have session_start() on this script I sometimes get the error message for "session already started". For that I've put these lines: ...
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How to send a PUT/DELETE request in jQuery?

...ch as PUT and DELETE, can also be used here, but they are not supported by all browsers." from: api.jquery.com/jQuery.ajax/#options – andilabs Dec 2 '13 at 8:11 23 ...
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How to detect if app is being built for device or simulator in Swift

... ... #endif After Swift 4.1 version Latest use, now directly for all in one condition for all types of simulators need to apply only one condition - #if targetEnvironment(simulator) // your simulator code #else // your real device code #endif For more clarification, you can check S...
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difference between foldLeft and reduceLeft in Scala

...e between reducing and folding The difference is not the implementation at all, just look at the signatures. The question doesn't have anything to do with Scala in particular, it's rather about the two concepts of functional programming. Back to your question: Here is the signature of foldLeft (c...
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Navigation in django

... I like this idea a lot, especially for flexibility, but it comes with the less-DRY trade-off. I did start using this in a site though. – anonymous coward Sep 22 '09 at 14:47 ...
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Execute code when Django starts ONCE only?

... entirely a separate problem. The idea of special one-time startup before all management commands is hard to understand. You'll have to provide something specific. Perhaps in another question. – S.Lott Feb 13 '12 at 12:49 ...
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How would one write object-oriented code in C? [closed]

What are some ways to write object-oriented code in C? Especially with regard to polymorphism. 32 Answers ...