大约有 45,000 项符合查询结果（耗时：0.0793秒） [XML]
Android static object lifecycle
...cation runs inside a DVM.
A DVM manages class loading unloading, instance lifecycle, GC etc.
Lifetime of a static variable: A static variable comes into existence when a class is loaded by the JVM and dies when the class is unloaded.
So if you create an android application and initialize a static ...
Linux how to copy but not overwrite? [closed]
...
Note, this will exit with an error if the file exists. To exit with success, try cp -n source.txt destination.txt || true
– galenandrew
Apr 1 '16 at 16:38
...
#pragma pack effect
I was wondering if someone could explain to me what the #pragma pack preprocessor statement does, and more importantly, why one would want to use it.
...
Why git keeps showing my changes when I switch branches (modified,added, deleted files) no matter if
...before stashing. That said, I'm not sure you actually want to stash here - if you intend for those changes to be part of the branch you're switching away from, commit them. (If you intend to switch back to that branch and work on the changes more before committing them, then stash may be the right t...
When is layoutSubviews called?
...e
intelligently calls layoutSubviews on
the view having its frame set only
if the size parameter of the frame is
different
scrolling a UIScrollView
causes layoutSubviews to be called on
the scrollView, and its superview
rotating a device only calls
layoutSubview on the parent view (the
responding vi...
How to Parse Command Line Arguments in C++? [duplicate]
What is the best way of parsing command-line arguments in C++ if the program is specified
to be run like this:
10 Answers
...
How to do stateless (session-less) & cookie-less authentication?
...quest to authenticate the user. This, in my opinion, is unsafe, especially if the application isn't single page. It is also not scalable, especially if you want to add authorization to your app in addition to authentication in the future (although I guess you could build something based on logins to...
Is assert evil? [closed]
...isused.
Assert is for sanity checks. Things that should kill the program if they are not correct. Not for validation or as a replacement for error handling.
share
|
improve this answer
|...
Pass all variables from one shell script to another?
...ariables like arrays easily, but also means that the other script could modify variables in the source shell.
UPDATE:
To use export to set an environment variable, you can either use an existing variable:
A=10
# ...
export A
This ought to work in both bash and sh. bash also allows it to be co...
Best practice for creating millions of small temporary objects
...
Escape analysis often disappoints, it is worth checking if the JVM has figured out what you're doing or not.
– Nitsan Wakart
May 8 '13 at 8:09
2
...