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Virtual/pure virtual explained
...han just the level at which it was created. Therefore if one method of the base class calls a virtual method, the version defined in the derived class will be used instead of the version defined in the base class.
This is in contrast to non-virtual functions, which can still be overridden in a der...
Base64 length calculation?
After reading the base64 wiki ...
15 Answers
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Embedding Base64 Images
Purely out of curiosity, which browsers does Base64 image embedding work in? What I'm referring to is this .
3 Answers
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How to display Base64 images in HTML?
I'm having trouble displaying a Base64 image inline.
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Is it possible to make abstract classes in Python?
...rties as using the abc module does. You can still instantiate the abstract base class itself, and you won't find your mistake until you call the abstract method at runtime.
But if you're dealing with a small set of simple classes, maybe with just a few abstract methods, this approach is a little e...
Is Big O(logn) log base e?
...ically noted as O(logn). With a lowercase 'l' in log, does this imply log base e (n) as described by the natural logarithm? Sorry for the simple question but I've always had trouble distinguishing between the different implied logarithms.
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Method Resolution Order (MRO) in new-style classes?
...lution order is D - B - A - C - A : so when looking up D.x, A is the first base in resolution order to solve it, thereby hiding the definition in C. While:
>>> class A(object): x = 'a'
...
>>> class B(A): pass
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>>> class C(A): x = 'c'
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>>> class D(B, C)...
Log to the base 2 in python
How should I compute log to the base two in python. Eg. I have this equation where I am using log base 2
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Can virtual functions have default parameters?
If I declare a base class (or interface class) and specify a default value for one or more of its parameters, do the derived classes have to specify the same defaults and if not, which defaults will manifest in the derived classes?
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Base64 Decoding in iOS 7+
...ing = "foo"
Encoding
let plainData = plainString.data(using: .utf8)
let base64String = plainData?.base64EncodedString()
print(base64String!) // Zm9v
Decoding
if let decodedData = Data(base64Encoded: base64String!),
let decodedString = String(data: decodedData, encoding: .utf8) {
print(dec...