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What is the >>>= operator in C?
Given by a colleague as a puzzle, I cannot figure out how this C program actually compiles and runs. What is this >>>= operator and the strange 1P1 literal? I have tested in Clang and GCC. There are no warnings and the output is "???"
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Checking images for similarity with OpenCV
...mparison of two images, returning some value (maybe a percentage) that indicates how similar these images are? E.g. 100% would be returned if the same image was passed twice, 0% would be returned if the images were totally different.
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Can I 'git commit' a file and ignore its content changes?
Every developer on my team has their own local configuration. That configuration information is stored in a file called devtargets.rb which is used in our rake build tasks. I don't want developers to clobber each other's devtargets file, though.
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Local variables in nested functions
... an index to reference each cell. pet_function thus has one free variable (cage) which is then referenced via a closure cell, index 0. The closure itself points to the local variable cage in the get_petters function.
When you actually call the function, that closure is then used to look at the valu...
Composer: how can I install another dependency without updating old ones?
... constraint to use, install the package, and add it to composer.lock.
You can also specify an explicit version constraint by running:
composer require new/package ~2.5
–OR–
Using the update command, add the new package manually to composer.json, then run:
composer update new/package
I...
CSS content property: is it possible to insert HTML instead of Text?
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@ludicco: That's because the images themselves aren't DOM elements (not counting <img>), they're just being drawn onto existing elements, so by applying background or list images you're not really modifying the DOM.
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What's the difference between using CGFloat and float?
...weichsel stated, CGFloat is just a typedef for either float or double. You can see for yourself by Command-double-clicking on "CGFloat" in Xcode — it will jump to the CGBase.h header where the typedef is defined. The same approach is used for NSInteger and NSUInteger as well.
These types were int...
What does the 'standalone' directive mean in XML?
...;img> tag since it is supposed to be EMPTY. This is what the XML specification means by "markup declarations can affect the content of the document." You can then use the standalone declaration to tell the parser to ignore these rules.
Whether or not your parser actually does this is another que...
When should Flask.g be used?
...rkus, explains some of the changes to g in 0.10:
g now lives in the application context.
Every request pushes a new application context, wiping the old one, so g can still be used to set flags per-request without change to code.
The application context is popped after teardown_request is called. (...
What is NODE_ENV and how to use it in Express?
...ariable made popular by the express web server framework. When a node application is run, it can check the value of the environment variable and do different things based on the value. NODE_ENV specifically is used (by convention) to state whether a particular environment is a production or a develo...