大约有 40,000 项符合查询结果(耗时:0.0464秒) [XML]

https://stackoverflow.com/ques... 

How do I hide a menu item in the actionbar?

... Get a MenuItem pointing to such item, call setVisible on it to adjust its visibility and then call invalidateOptionsMenu() on your activity so the ActionBar menu is adjusted accordingly. Update: A MenuItem is not a regular view that's part of your layout. Its som...
https://stackoverflow.com/ques... 

Suppress/ print without b' prefix for bytes in Python 3

... If we take a look at the source for bytes.__repr__, it looks as if the b'' is baked into the method. The most obvious workaround is to manually slice off the b'' from the resulting repr(): >>> x = b'\x01\x02\x03\x04' >>> print(repr(x)) b'\x01\x02...
https://stackoverflow.com/ques... 

JSON formatter in C#?

... Cool! Looks like that was added in .NET Core 3.0 actually, which was released September 23, 2019 – mpen Aug 25 at 0:34 add a comment  |...
https://stackoverflow.com/ques... 

@try - catch block in Objective-C

... All work perfectly :) NSString *test = @"test"; unichar a; int index = 5; @try { a = [test characterAtIndex:index]; } @catch (NSException *exception) { NSLog(@"%@", exception.reason); NSLog(@"Char at in...
https://stackoverflow.com/ques... 

how to “reimport” module to python then code be changed after import

...port sys then reload(sys.modules['foo']) or perhaps reload(sys.modules[bar.__module__]) – drevicko Oct 28 '13 at 1:02 3 ...
https://stackoverflow.com/ques... 

what is the unsigned datatype?

...or unsigned long long int — float — double — long double — _Bool — float _Complex — double _Complex — long double _Complex — atomic type specifier — struct or union specifier — enum specifier — typedef name So in case of unsigned int we can either writ...
https://stackoverflow.com/ques... 

linq where list contains any in list

... Sounds like you want: var movies = _db.Movies.Where(p => p.Genres.Intersect(listOfGenres).Any()); share | improve this answer | fo...
https://stackoverflow.com/ques... 

The role of #ifdef and #ifndef

...o do something like that with the old #ifdef/#ifndef pair. #if defined(ORA_PROC) || defined(__GNUC) && __GNUC_VERSION > 300 share | improve this answer | follow ...
https://stackoverflow.com/ques... 

MySQL Fire Trigger for both Insert and Update

...me. 1. Define the INSERT trigger: DELIMITER // DROP TRIGGER IF EXISTS my_insert_trigger// CREATE DEFINER=root@localhost TRIGGER my_insert_trigger AFTER INSERT ON `table` FOR EACH ROW BEGIN -- Call the common procedure ran if there is an INSERT or UPDATE on `table` -- NEW.id is an...
https://stackoverflow.com/ques... 

Bash if statement with multiple conditions throws an error

...ions. tldp.org/LDP/Bash-Beginners-Guide/html/sect_07_01.html Update Actually you could still use && and || with the -eq operation. So your script would be like this: my_error_flag=1 my_error_flag_o=1 if [ $my_error_flag -eq 1 ] || [ $my_error_flag_o -eq 2 ] || ([ $my_error_flag -eq 1 ] ...