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Why do we need virtual functions in C++?
...ey're required:
Let's say you have these two classes:
class Animal
{
public:
void eat() { std::cout << "I'm eating generic food."; }
};
class Cat : public Animal
{
public:
void eat() { std::cout << "I'm eating a rat."; }
};
In your main function:
Animal *ani...
How do I determine file encoding in OS X?
...s no definite way to detect the encoding of a file. Read this answer, it explains why.
There's a command line tool, enca, that attempts to guess the encoding. You might want to check it out.
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jQuery OR Selector?
...ondering if there is a way to have "OR" logic in jQuery selectors. For example, I know an element is either a descendant of an element with class classA or classB, and I want to do something like elem.parents('.classA or .classB') . Does jQuery provide such functionality?
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How to exit a 'git status' list in a terminal?
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I have to guess here, but git is probably running its output into your $PAGER program, likely less or more. In either case, typing q should get you out.
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How does C compute sin() and other math functions?
I've been poring through .NET disassemblies and the GCC source code, but can't seem to find anywhere the actual implementation of sin() and other math functions... they always seem to be referencing something else.
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How can I use functional programming in the real world? [closed]
... they avoid bugs by eliminating state, but also because they can be easily parallelized automatically for you, without you having to worry about the thread count.
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In Android, how do I set margins in dp programmatically?
...single view. However, I was wondering if there isn't an easier way. I'll explain why I rather wouldn't want to use this approach:
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Is Java Regex Thread Safe?
I have a function that uses Pattern#compile and a Matcher to search a list of strings for a pattern.
5 Answers
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How does this site infecting script work?
My Joomla! website has been repeatedly hacked into. Someone, somehow, managed to inject the following rubbish into the key php scripts, but I mean not to talk about configuring Joomla. The site is not visited much (at times I fear I might be the only visitor to that site...) and I don't care much to...
How to prove that a problem is NP complete?
I have problem with scheduling. I need to prove that the problem is NP complete. What can be the methods to prove it NP complete?
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