大约有 6,150 项符合查询结果（耗时：0.0202秒） [XML]
Is there any difference between a GUID and a UUID?
I see these 2 acronyms thrown around, and I was wondering if there are any differences between a GUID and a UUID?
6 Answers...
What is the best method of handling currency/money?
I'm working on a very basic shopping cart system.
13 Answers
13
...
What does the comma operator , do?
...
lillqlillq
12.5k2020 gold badges5050 silver badges5858 bronze badges
...
Why does one use dependency injection?
I'm trying to understand dependency injections (DI), and once again I failed. It just seems silly. My code is never a mess; I hardly write virtual functions and interfaces (although I do once in a blue moon) and all my configuration is magically serialized into a class using json.net (sometimes us...
extra qualification error in C++
...
This is because you have the following code:
class JSONDeserializer
{
Value JSONDeserializer::ParseValue(TDR type, const json_string& valueString);
};
This is not valid C++ but Visual Studio seems to accept it. You need to change it to the following c...
How can I pass a member function where a free function is expected?
The question is the following: consider this piece of code:
9 Answers
9
...
What is the difference between gsub and sub methods for Ruby Strings
I have been perusing the documentation for String today, and I saw the :sub method, which I'd never noticed before. I've been using :gsub and it appears that they are essentially the same. Can anyone explain the difference to me? Thanks!
...
What is the convention for word separator in Java package names?
How should one separate words in package names? Which of the following are correct?
6 Answers
...
jQuery: checking if the value of a field is null (empty)
Is this a good way to check if the value of a field is null ?
7 Answers
7
...
Is errno thread-safe?
...
Yes, it is thread safe. On Linux, the global errno variable is thread-specific. POSIX requires that errno be threadsafe.
See http://www.unix.org/whitepapers/reentrant.html
In POSIX.1, errno is defined as an
external global variable. But this
definition ...