大约有 40,700 项符合查询结果（耗时：0.0569秒） [XML]
How to check if AlarmManager already has an alarm set?
When my app starts, I want it to check if a particular alarm (registered via AlarmManager) is already set and running. Results from google seem to indicate that there is no way to do this. Is this still correct? I need to do this check in order to advise the user before any action is taken to create...
How do you properly use namespaces in C++?
...
Namespaces are packages essentially. They can be used like this:
namespace MyNamespace
{
class MyClass
{
};
}
Then in code:
MyNamespace::MyClass* pClass = new MyNamespace::MyClass();
Or, if you want to always use a specific namespace, you can do this:
using namespace MyNam...
What's the recommended way to extend AngularJS controllers?
...
Perhaps you don't extend a controller but it is possible to extend a controller or make a single controller a mixin of multiple controllers.
module.controller('CtrlImplAdvanced', ['$scope', '$controller', function ($scope, $controller) {
// Initialize the super cla...
How is the default max Java heap size determined?
...+PrintFlagsFinal -version | grep HeapSize
I believe the resulting output is in bytes.
share
|
improve this answer
|
follow
|
...
What does $$ mean in the shell?
...name in a shell for temp files was to use a double dollar sign ( $$ ). This does produce a number that varies from time to time... but if you call it repeatedly, it returns the same number. (The solution is to just use the time.)
...
Get to UIViewController from UIView?
Is there a built-in way to get from a UIView to its UIViewController ? I know you can get from UIViewController to its UIView via [self view] but I was wondering if there is a reverse reference?
...
How do I get a Date without time in Java?
...o such concept as "just a date", Joda Time does have a type representing this (LocalDate). Your code will be much clearer if you're able to use types which represent what you're actually trying to do.
There are many, many other reasons to use Joda Time or java.time instead of the built-in java.util...
What is the most efficient way of finding all the factors of a number in Python?
...
from functools import reduce
def factors(n):
return set(reduce(list.__add__,
([i, n//i] for i in range(1, int(n**0.5) + 1) if n % i == 0)))
This will return all of the factors, very quickly, of a number n.
Why square root as the upper limit?
sqrt(x) * sqrt(x) = x. So ...
What are the differences between delegates and events?
...on adds a layer of abstraction and protection on the delegate instance. This protection prevents clients of the delegate from resetting the delegate and its invocation list and only allows adding or removing targets from the invocation list.
...
jquery - return value using ajax result on success
...
The trouble is that you can not return a value from an asynchronous call, like an AJAX request, and expect it to work.
The reason is that the code waiting for the response has already executed by the time the response is received.
The ...