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C++ auto keyword. Why is it magic?
... templates on any compiler that even sort of attempted to implement C++98/03. As such, adding support for auto was apparently fairly easy for essentially all the compiler teams--it was added quite quickly, and there seem to have been few bugs related to it either.
When this answer was originally wr...
Checking if a field contains a string
...
730
You can do it with the following code.
db.users.findOne({"username" : {$regex : ".*son.*"}});
...
How does Python manage int and long?
...ns back. Before that it was possible to overflow an int through math ops.
3.x has further advanced this by eliminating long altogether and only having int.
Python 2: sys.maxint contains the maximum value a Python int can hold.
On a 64-bit Python 2.7, the size is 24 bytes. Check with sys.getsize...
What is a C++ delegate?
... {
return (int) d + 1;
}
};
// Use:
Functor f;
int i = f(3.14);
Option 2: lambda expressions (C++11 only)
// Syntax is roughly: [capture](parameter list) -> return type {block}
// Some shortcuts exist
auto func = [](int i) -> double { return 2*i/1.15; };
double d = func(...
Print multiple arguments in Python
..._future__ import print_function
Use the new f-string formatting in Python 3.6:
print(f'Total score for {name} is {score}')
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Why should I prefer to use member initialization lists?
...) { x = x_; }
int x;
};
class B
{
public:
B()
{
a.x = 3;
}
private:
A a;
};
In this case, the constructor for B will call the default constructor for A, and then initialize a.x to 3. A better way would be for B's constructor to directly call A's constructor in the ini...
How to use relative/absolute paths in css URLs?
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3 Answers
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How to get the parents of a Python class?
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answered Apr 10 '10 at 1:35
Ayman HouriehAyman Hourieh
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What's the difference between Task.Start/Wait and Async/Await?
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398
I may be missing something
You are.
what is the difference between doing Task.Wait a...
Is it possible to make abstract classes in Python?
...ct using one of three ways, depending upon your Python version.
In Python 3.4 and above, you can inherit from ABC. In earlier versions of Python, you need to specify your class's metaclass as ABCMeta. Specifying the metaclass has different syntax in Python 3 and Python 2. The three possibilities ar...