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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...
How to UPSERT (MERGE, INSERT … ON DUPLICATE UPDATE) in PostgreSQL?
...e.
If you're on 9.5 and don't need to be backward-compatible you can stop reading now.
9.4 and older:
PostgreSQL doesn't have any built-in UPSERT (or MERGE) facility, and doing it efficiently in the face of concurrent use is very difficult.
This article discusses the problem in useful detail.
In g...
Why Choose Struct Over Class?
...mportant when passing around a variable to many classes and/or in a multithreaded environment. If you can always send a copy of your variable to other places, you never have to worry about that other place changing the value of your variable underneath you.
With Structs, there is much less need to ...
How to declare a structure in a header that is to be used by multiple files in c?
...ame names), and none has drawbacks I know of, so using the same name makes reading simpler if you don't use C separate "namespaces" for structs and other symbols.
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Why does casting int to invalid enum value NOT throw exception?
...s are often used as flags:
[Flags]
enum Permission
{
None = 0x00,
Read = 0x01,
Write = 0x02,
}
...
Permission p = Permission.Read | Permission.Write;
The value of p is the integer 3, which is not a value of the enum, but clearly is a valid value.
I personally would rather have seen ...
What are the differences between Deferred, Promise and Future in JavaScript?
...larity and loosen coupling through a standardized interface. See suggested reading from @jfriend00:
Rather than directly passing callbacks to functions, something which
can lead to tightly coupled interfaces, using promises allows one to
separate concerns for code that is synchronous or asyn...
Why are only a few video games written in Java? [closed]
...d of course, the license needs to allow it).
Also, a lot of legacy code already exists in C++. If code from previous projects can be reused (say, if you're writing a sequel), that counts even more in favor of sticking with the same language, instead of rewriting it in a new language (more so since ...
Python (and Python C API): __new__ versus __init__
...behavior of __new__. We pass cls explicitly to __new__ because, as you can read here __new__ always requires a type as its first argument. It then returns an instance of that type. So we aren't returning an instance of the superclass -- we're returning an instance of cls. In this case, it's just the...
How to update PATH variable permanently from Windows command line?
... modifying system PATH. It just needs a simple C++ app with a few registry reads and writes, followed by a SendMessage. Set the requestedExecutionLevel to requireAdministrator in the app manifest.
– David Heffernan
Dec 2 '11 at 15:56
...
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
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