大约有 42,000 项符合查询结果（耗时：0.0538秒） [XML]
How to tell if JRE or JDK is installed
... testing. However, when I got a java application working on this computer, and then tried it on another, it complained that JDK was required. How can I check if JDK was somehow installed on my system? Note: the computer in question is a Mac.
...
When is the init() function run?
....")
}
}
AnswerToLife() is guaranteed to run before init() is called, and init() is guaranteed to run before main() is called.
Keep in mind that init() is always called, regardless if there's main or not, so if you import a package that has an init function, it will be executed.
Additionally,...
Why should casting be avoided? [closed]
...as possible since I am under the impression that it's poor coding practice and may incur a performance penalty.
14 Answers...
What's the difference between getRequestURI and getPathInfo methods in HttpServletRequest?
... lightweight front-controller. I need to match request paths to different handlers (actions) in order to choose the correct one.
...
return statement vs exit() in main()
...he return statements because I feel it's like reading any other function and the flow control when I'm reading the code is smooth (in my opinion). And even if I want to refactor the main() function, having return seems like a better choice than exit() .
...
Covariance and contravariance real world example
I'm having a little trouble understanding how I would use covariance and contravariance in the real world.
9 Answers
...
Is it possible to have nested templates in Go using the standard library?
.../django-templates does. Is it possible using just html/template in the standard library.
5 Answers
...
How should I read a file line-by-line in Python?
...files faster than the garbage collector calls finalizers on orphaned file handles. The usual workaround is to trigger the GC immediately, but this is a nasty hack and it has to be done by every function that could encounter the error, including those in libraries. What a nightmare.
Or you could j...
What is the difference between the remap, noremap, nnoremap and vnoremap mapping commands in Vim?
What is the difference between the remap , noremap , nnoremap and vnoremap mapping commands in Vim?
3 Answers
...
How does OAuth 2 protect against things like replay attacks using the Security Token?
As I understand it, the following chain of events occurs in OAuth 2 in order for Site-A to access User's information from Site-B .
...