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dynamic_cast and static_cast in C++
...er for the cast to be legal.
Casts can go in one of two directions: from base to derived (B2D) or from derived to base (D2B). It's simple enough to see how D2B casts would work at runtime. Either ptr was derived from Type or it wasn't. In the case of D2B dynamic_cast<>s, the rules are sim...
How do I base64 encode (decode) in C?
...ve binary data in an unsigned char variable.
I need to convert them to PEM base64 in c.
I looked in openssl library but i could not find any function.
Does any body have any idea?
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When to use virtual destructors?
...ght potentially delete an instance of a derived class through a pointer to base class:
class Base
{
// some virtual methods
};
class Derived : public Base
{
~Derived()
{
// Do some important cleanup
}
};
Here, you'll notice that I didn't declare Base's destructor to be v...
Convert an image (selected by path) to base64 string
How do you convert an image from a path on the user's computer to a base64 string in C#?
12 Answers
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Can I call a base class's virtual function if I'm overriding it?
...blic Foo {
// ...
void printStuff() {
Foo::printStuff(); // calls base class' function
}
};
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How to check whether a string is Base64 encoded or not
I want to decode a Base64 encoded string, then store it in my database. If the input is not Base64 encoded, I need to throw an error.
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What are the recommendations for html tag?
I've never seen <base> HTML tag actually used anywhere before. Are there pitfalls to its use that means I should avoid it?
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C# Class naming convention: Is it BaseClass or ClassBase or AbstractClass
What is the recommended approach to naming base classes? Is it prefixing the type name with " Base " or " Abstract " or would we just suffix it with "Base"?
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error: ‘std::ios_base::ios_base(const std::ios_base&)’ is private ...
error: ‘std::ios_base::ios_base(const std::ios_base&)’ is private ios_base(const ios_base&); synthesized method ‘std::basic_ostream::basic_ostream(const std::basic_ostream&)’ first required here这个错误的原因大概是std::ios_base类的拷贝构造函数是私有的，从retu...
NodeJS: Saving a base64-encoded image to disk
My Express app is receiving a base64-encoded PNG from the browser (generated from canvas with toDataURL() ) and writing it to a file. But the file isn't a valid image file, and the "file" utility simply identifies it as "data".
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