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Calling C++ class methods via a function pointer
...he parameter is normally LPARAM or similar rather than a pointer, and some casting is needed.
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Is it possible to set a number to NaN or infinity?
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Cast from string using float():
>>> float('NaN')
nan
>>> float('Inf')
inf
>>> -float('Inf')
-inf
>>> float('Inf') == float('Inf')
True
>>> float('Inf') == 1
False
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What does it mean to “program to an interface”?
...ecause they have that method, while you can't call other methods without a cast. However, each objects individual BeAnnoying() method will be called.
– D. Ben Knoble
May 26 '15 at 1:16
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What exactly is Type Coercion in Javascript?
...te code, like Number(value), it’s called explicit type coercion (or type casting).
Since JavaScript is a weakly-typed language, values can also be converted between different types automatically, and it is called implicit type coercion. It usually happens when you apply operators to values of diff...
Virtual/pure virtual explained
... it, as long as it is derived from Animal. The compiler will automagically cast any Animal-derived class to a Animal as it is a base class.
If we do this:
Duck d;
SomeFunction(&d);
it'd output '2'. If we do this:
Horse h;
SomeFunction(&h);
it'd output '4'. We can't do this:
Animal a;...
Post-increment and pre-increment within a 'for' loop produce same output [duplicate]
...e: I want to know how they approach a problem, and how they proceed when I cast doubt on the way their world works.
At this point, most candidates realize their error and find the correct answer. But I had one who insisted his original answer was right, then changed the way he translated the for()...
Is there more to an interface than having the correct methods
...o kinds of error below at compile-time:
// Compiler error: Corn cannot be cast to Animal.
Animal farmObject = new Corn();
farmObject makeNoise();
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// Compiler error: Animal doesn't have the harvest message.
Animal farmObject = new Cow();
farmObject.harvest();
So....to summarize:
Interfa...
Is floating-point math consistent in C#? Can it be?
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Wouldn't casting to double each time after an operation strip away the unwanted bits, yielding consistent results?
– IllidanS4 wants Monica back
Feb 27 '16 at 22:58
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When to use inline function and when not to use it?
...anguage rules about multiple definitions. Also, having static data isn't a cast iron reason to avoid inlining a function. The implementation is obliged to allocate a single static object for each function static whether or not the function is declared inline or not. Classes are still extensible if t...
What does the Q_OBJECT macro do? Why do all Qt objects need this macro?
... use the signal/slot mechanism. The absence of Q_OBJECT breaks the qobject_cast and introspection. It can lead to some perplexing behavior, so it's a bad idea.
– Unslander Monica
Apr 7 '16 at 20:39
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