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How does Duff's device work?
... 1: *to = *from++;
} while (--n > 0);
}
}
and I had no idea what was happening.
Maybe not when this question was asked, but now Wikipedia has a very good explanation
The device is valid, legal C by virtue of two attributes in C:
Relaxed specification of the switch statement in ...
400 vs 422 response to POST of data
...github.com/v3/#client-errors
Maybe copying from well known APIs is a wise idea:
There are three possible types of client errors on API calls that receive request bodies:
Sending invalid JSON will result in a 400 Bad Request response.
HTTP/1.1 400 Bad Request
Content-Length: 35
{"message"...
What are the differences between virtual memory and physical memory?
...ou can imagine, bad things will happen.
So clearly, as you can see, this idea is rather naive.
Possible solution 2: Let's try another scheme - where OS will do majority of the memory management. Softwares, whenever they require any memory, will just request the OS, and the OS will accommodate ...
How can I decompress a gzip stream with zlib?
...
great answer for strings, any idea how to do this for a stream without reading the entire file into memory?
– Josh J
Jun 28 '17 at 15:33
...
Are multiple `.gitignore`s frowned on?
...itkeep is a nice way to do this too... just another convention. I like the idea of using a readme file, because then you could explain what the directory is used for, in that read me file.
– Gavin Pickin
Jun 5 '17 at 16:44
...
What is the advantage of GCC's __builtin_expect in if else statements?
...
The idea of __builtin_expect is to tell the compiler that you'll usually find that the expression evaluates to c, so that the compiler can optimize for that case.
I'd guess that someone thought they were being clever and that th...
Change key pair for ec2 instance
...ic instructions here that build on this answer but is essentially the same idea - gist.github.com/tamoyal/1b7ec4d3871b343d353d. As @kgadek noted, it's a bit dirty and time consuming but it's a great option if you are locked out of the server you want to make the key change on and if you don't want ...
How to implement the factory method pattern in C++ correctly
... and discussions", see the "No need for static Create methods".
From this idea, I've done a factory. Note that I'm using Qt, but you can change QMap and QString for std equivalents.
#ifndef FACTORY_H
#define FACTORY_H
#include <QMap>
#include <QString>
template <typename T>
cla...
What is a semaphore?
...ent resources.
...
At this point an interesting analogy is made using the idea of bathroom keys as protecting shared resources - the bathroom. If a shop has a single bathroom, then a single key will be sufficient to protect that resource and prevent multiple people from using it simultaneously.
If...
What is the difference between statically typed and dynamically typed languages?
...ich improves on it, is now about 15 years old. Even C# is now adopting the idea, which will raise a lot of eyebrows and undoubtedly give rise to claims of its being “weakly typed”. continued...
– Vipresh
Aug 16 '14 at 10:29
...