大约有 45,000 项符合查询结果（耗时：0.0643秒） [XML]
How to add a touch event to a UIView?
...ch i have implemented DropMenu whenever a view is tapped. i am getting an error "Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value" at myView.addGestureRecognizer(tapGesture) when ever i go to next screen
– Muhammad Ahmed
Sep 1...
How to get IP address of the device from code?
....
* @param str which to be converted
* @return array of NULL if error was found
*/
public static byte[] getUTF8Bytes(String str) {
try { return str.getBytes("UTF-8"); } catch (Exception ex) { return null; }
}
/**
* Load UTF8withBOM or any ansi text file.
...
How do I show multiple recaptchas on a single page?
...expired-callback' : jQuery(el).attr('data-expired-callback')
,'error-callback' : jQuery(el).attr('data-error-callback')
});
});
};
</script>
share
|
improve this ans...
Is there a simple, elegant way to define singletons? [duplicate]
...
class Foo:
def __init__(self):
print 'Foo created'
f = Foo() # Error, this isn't how you get the instance of a singleton
f = Foo.instance() # Good. Being explicit is in line with the Python Zen
g = Foo.instance() # Returns already created instance
print f is g # True
And here's the c...
Find rows with multiple duplicate fields with Active Record, Rails & Postgres
...
adding the .count gives PG::UndefinedFunction: ERROR: function count
– Magne
Jul 8 '15 at 13:01
1
...
How to parse JSON in Scala using standard Scala classes?
...answer, it led me down the right path. However, it isn't great at handling error conditions. If the desired node does not exist, you get a cast exception. I've adapted this slightly to make use of Option to better handle this.
class CC[T] {
def unapply(a:Option[Any]):Option[T] = if (a.isEmpty) {
...
Can I use mstest.exe without installing Visual Studio?
...Per above , I have installed test agent and build tools but I am receiving error No test is available in C:\Users\..\Desktop\MyExeName.exe... . I have opened a question on SO . If you have any clue, I'd appreciate your help.
– user1207289
Feb 3 at 18:33
...
Generate full SQL script from EF 5 Code First Migrations
...
Just trial and error really after trying everything I could think of to trick it into working :)
– Matt Wilson
Mar 10 '14 at 21:20
...
Should Gemfile.lock be included in .gitignore?
...ock, the next dude to install the project might see all kinds of confusing errors, blaming himself, but he was just that lucky guy getting the next version of super gem, breaking existing dependencies.
Worse, this happened on the servers, getting untested version unless being disciplined and instal...
When to use virtual destructors?
...would it make sense to have the compiler check this condition and issue an error is it is not satisfied?
– Giorgio
May 6 '12 at 9:29
...