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const vs constexpr on variables

...u can not modify them. However only PI2 is a compile-time constant. It shall be initialized at compile time. PI1 may be initialized at compile time or run time. Furthermore, only PI2 can be used in a context that requires a compile-time constant. For example: constexpr double PI3 = PI1; // er...
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ASP.NET MVC - TempData - Good or bad practice

...e it would be gone. Well I guess I'm also hesitant to use it as its not really well defined how reliable it is. I wonder if the problem is that you're having the action redirect to another page before the confirm step. I wonder if instead after they first submit, you could do enough processing to...
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Force drop mysql bypassing foreign key constraint

I'm trying to delete all tables from a database except one, and I end up having the following error: 6 Answers ...
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Directive isolate scope with ng-repeat scope in AngularJS

...ed into ngRepeat for use on your directive's attributes do use a prototypically-inherited scope the reason your directive doesn't work has nothing to do with the isolate scope Here's an example of the same code but with the directive removed: <li ng-repeat="name in names" ng-class="{ activ...
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In a PHP project, what patterns exist to store, access and organize helper objects? [closed]

...ncy-injection-to.html http://googletesting.blogspot.com/2008/08/where-have-all-singletons-gone.html Alternatives a service provider http://java.sun.com/blueprints/corej2eepatterns/Patterns/ServiceLocator.html dependency injection http://en.wikipedia.org/wiki/Dependency_injection and a php expl...
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Can I pass an array as arguments to a method with variable arguments in Java?

...ompatibility. So you should just be able to prepend extraVar to args and call String.format(format, args). share | improve this answer | follow | ...
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Getting SyntaxError for print with keyword argument end=' '

...print ("foo" % bar, end=" ") or print "foo" % bar, end=" " i.e. as a call to print with a tuple as argument. That's obviously bad syntax (literals don't take keyword arguments). In Python 3.x print is an actual function, so it takes keyword arguments, too. The correct idiom in Python 2.x for ...
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Why do we need virtual functions in C++?

... a rat." So far so good, right? Animals eat generic food, cats eat rats, all without virtual. Let's change it a little now so that eat() is called via an intermediate function (a trivial function just for this example): // This can go at the top of the main.cpp file void func(Animal *xyz) { xyz-...
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Why can't I use a list as a dict key in python?

..., with the hash as, say, their memory location? It can be done without really breaking any of the requirements, but it leads to unexpected behavior. Lists are generally treated as if their value was derived from their content's values, for instance when checking (in-)equality. Many would - underst...
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Showing a different background colour in Vim past 80 characters

... Mono 11 font and the molokai color scheme. You can find my vim config and all of my dotfiles on GitHub. share | improve this answer | follow | ...