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In C# what is the difference between a destructor and a Finalize method in a class?
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At least from working with Mono, C# is actually modeled after C++, and most native C# objects are C++ objects. The way the compiler that compiled Mono works dictates how those C++ objects are destructed, and likewise, how C# object f...
How to avoid isset() and empty()
...e key exists or not, because you know it does. If you're getting the array from an external source, the value will most likely not be null but '', 0, '0', false or something like it, i.e. a value you can evaluate with isset or empty, depending on your intent. If you regularly set an array key to nul...
Difference between knockout View Models declared as object literals vs functions
...d observable can be bound to the appropriate value of this, even if called from a different scope.
With an object literal, you would have to do:
var viewModel = {
first: ko.observable("Bob"),
last: ko.observable("Smith"),
};
viewModel.full = ko.computed(function() {
return this.first() +...
How to specify function types for void (not Void) methods in Java8?
...as parameters, bound them to variable references and return them as values from other methods, then they pretty much serve a similar purpose.
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When vectors are allocated, do they use memory on the heap or the stack?
... the heap and header info is on the stack, when the header info is removed from memory, like function return, what will happen to the elements memories? Are them reclaimed with the header info or not? If they are not, will this cause memory leak?
– flyrain
Sep ...
How to use int.TryParse with nullable int? [duplicate]
...Singh: We don't know whether strValue could be null or not. If it's coming from a text box, it probably can't be null. My code doesn't try to address this, but we really don't know whether or not it should address it.
– Jon Skeet
Jun 14 '13 at 17:29
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REST response code for invalid data
...d it should be treated by browsers the same as any other 4xx status code.
From RFC 4918:
The 422 (Unprocessable Entity) status code means the server understands the content type of the request entity (hence a 415(Unsupported Media Type) status code is inappropriate), and the syntax of the reque...
C/C++ NaN constant (literal)?
...e is NaN, you can't compare it with another NaN value. Instead use isnan() from <math.h> in C, or std::isnan() from <cmath> in C++.
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async await return Task
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async methods are different than normal methods. Whatever you return from async methods are wrapped in a Task.
If you return no value(void) it will be wrapped in Task, If you return int it will be wrapped in Task<int> and so on.
If your async method needs to return int you'd mark the ...
How to convert QString to std::string?
...itali No. That loses non-latin1 characters. Try this: QString s = QString::fromUtf8("árvíztűrő tükörfúrógép ÁRVÍZTŰRŐ TÜKÖRFÚRÓGÉP"); std::cout << s.toStdString() << std::endl; std::cout << s.toUtf8().constData() << std::endl;. The first is incorrect, the se...