大约有 41,000 项符合查询结果（耗时：0.0606秒） [XML]
Android Studio: Android Manifest doesn't exists or has incorrect root tag
I got this error on Android Studio (AS):
11 Answers
11
...
How do I list one filename per output line in Linux?
I'm using ls -a command to get the file names in a directory, but the output is in a single line.
7 Answers
...
Regular expression \p{L} and \p{N}
...
\p{L} matches a single code point in the category "letter".
\p{N} matches any kind of numeric character in any script.
Source: regular-expressions.info
If you're going to work with regular expressions a lot, I'd suggest bookmarking that site, it's very useful.
...
What's the pythonic way to use getters and setters?
...
Is the setter for x called in the initializer when instantiating _x?
– Casey
Jul 3 '19 at 15:12
7
...
bool to int conversion
How portable is this conversion. Can I be sure that both assertions pass?
4 Answers
4
...
How do you list the active minor modes in emacs?
How do you list the active minor modes in emacs?
5 Answers
5
...
How to declare global variables in Android?
...Singletons rather than subclassing Application. Read it at your own risk.
ORIGINAL ANSWER:
The more general problem you are encountering is how to save state across several Activities and all parts of your application. A static variable (for instance, a singleton) is a common Java way of achievin...
Is it possible to decrypt MD5 hashes?
...MD5 is not encryption (though it may be used as part of some encryption algorithms), it is a one way hash function. Much of the original data is actually "lost" as part of the transformation.
Think about this: An MD5 is always 128 bits long. That means that there are 2128 possible MD5 hashes. That...
Remove ActiveRecord in Rails 3
...is out, I thought I'd have a look at rewriting an app I have just started work on in Rails 3 beta, both to get a feel for it and get a bit of a head-start. The app uses MongoDB and MongoMapper for all of its models and therefore has no need for ActiveRecord. In the previous version, I am unloading a...
How to get the current user in ASP.NET MVC
In a forms model, I used to get the current logged-in user by:
20 Answers
20
...