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Virtual/pure virtual explained

... when a virtual function is overridden the most-derived version is used at all levels of the class hierarchy, rather than just the level at which it was created. Therefore if one method of the base class calls a virtual method, the version defined in the derived class will be used instead of the ver...
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How do I raise a Response Forbidden in django

...48/… I'm not sure about Django, but Django REST Framework has: from rest_framework import status status.HTTP_403_FORBIDDEN 403 – David Watson Mar 4 '16 at 18:35 ...
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How to ssh to vagrant without actually running “vagrant ssh”?

...sh" because it's -c option didn't pass on arguments properly. This is basically what it does (there might be more, but it works fine this way) #!/bin/sh PORT=$(vagrant ssh-config | grep Port | grep -o '[0-9]\+') ssh -q \ -o UserKnownHostsFile=/dev/null \ -o StrictHostKeyChecking=no \ -i...
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What is the purpose of the HTML “no-js” class?

...f/else statement in your CSS code. For example, .myclass { /* CSS code for all versions of your page goes here */ }, .js .myclass { /* This CSS code will only show up if JS is enabled */ } and .no-js .myclass { /* This CSS code will only show up if JS is disabled. */ }. Hope this helps. -Nick ...
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How should you build your database from source control?

... production environments in deployment scripts? Use templates, so that actually you would produce different set of scripts for each environment (ex. references to external systems, linked databases, etc) How do you test that the deployment scripts will work as effectively against production as they ...
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What's the difference of “./configure” option “--build”, “--host” and “--target”?

... As noted in this blog post and alluded to in the GCC Configure Terms, --target only applies when you are compiling toolchains. When you are doing normal cross-compilation of a library or binary you use --build=the architecture of the build machine --hos...
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How can I change a file's encoding with vim?

...r just to do encoding conversion seems like using too big hammer for too small nail. Just: iconv -f utf-16 -t utf-8 file.xml > file.utf8.xml And you're done. share | improve this answer ...
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PHP Multidimensional Array Searching (Find key by specific value)

...e are other threads about searching multidimensional arrays, but I'm not really understanding enough to apply to my situation. Thanks very much for any help! ...
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adb shell command to make Android package uninstall dialog appear

...package:your app package". This will start the activity in charge of uninstalling packages and try to uninstall the package provided in data. Documentation can be found by using "adb shell am" command. – pcans Oct 18 '12 at 9:23 ...
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Are there benefits of passing by pointer over passing by reference in C++?

...ect", then use a pointer instead of a reference. Also, passing by pointer allows you to explicitly see at the call site whether the object is passed by value or by reference: // Is mySprite passed by value or by reference? You can't tell // without looking at the definition of func() func(mySpri...