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Private virtual method in C++
...ior from violating that trust (e.g. labeled 'clueless' by not bothering to read your documentation) have only themselves to blame.
Update: I've had some feedback that claims you can "chain" virtual function implementations this way using private virtual functions. If so, I'd sure like to see it.
T...
Python Infinity - Any caveats?
...result in inf or NaN, I just wanted to make it clear to others that may be reading through the comments, that 1/float('infinity')==0.0 is true; for, as you are approaching infinity, the result of the division approaches 0. I know it's just basic calculus, but I wanted to be sure those reading under...
How do malloc() and free() work?
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OK some answers about malloc were already posted.
The more interesting part is how free works (and in this direction, malloc too can be understood better).
In many malloc/free implementations, free does normally not return the memory to the operating system (...
Where and why do I have to put the “template” and “typename” keywords?
...le:
boost::function< int() > f;
It might look obvious to a human reader. Not so for the compiler. Imagine the following arbitrary definition of boost::function and f:
namespace boost { int function = 0; }
int main() {
int f = 0;
boost::function< int() > f;
}
That's actually ...
What is the difference between i++ and ++i?
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The typical answer to this question, unfortunately posted here already, is that one does the increment "before" remaining operations and the other does the increment "after" remaining operations. Though that intuitively gets the idea across, that statement is on the face of it completely w...
Expand Python Search Path to Other Source
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You should also read about python packages here: http://docs.python.org/tutorial/modules.html.
From your example, I would guess that you really have a package at ~/codez/project. The file __init__.py in a python directory maps a directory ...
What are the disadvantages of using persistent connection in PDO
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Please be sure to read this answer below, which details ways to mitigate the problems outlined here.
The same drawbacks exist using PDO as with any other PHP database interface that does persistent connections: if your script terminates un...
How to wait for all goroutines to finish without using time.Sleep?
...ollect and process the results in the second for loop (as soon as they are ready)
– andras
Aug 13 '13 at 22:55
5
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Qt events and signal/slots
... can get delivered immediately or deferred via a queue (if you are using threads).
A signal can be generated.
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How to cancel a Task in await?
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Read up on Cancellation (which was introduced in .NET 4.0 and is largely unchanged since then) and the Task-Based Asynchronous Pattern, which provides guidelines on how to use CancellationToken with async methods.
To summari...