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Why isn't there a Guid.IsNullOrEmpty() method
This keeps me wondering why Guid in .NET does not have IsNullOrEmpty() method (where empty means all zeros)
6 Answers
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Check if a class has a member function of a given signature
...void ReportMemUsage(const TMap& m, std::true_type)
{
// We may call used_memory() on m here.
}
template<typename TMap>
void ReportMemUsage(const TMap&, std::false_type)
{
}
template<typename TMap>
void ReportMemUsage(const TMap& m)
{
ReportMemUsage(m,
std...
How to install latest (untagged) state of a repo using bower?
... also just use <git-url>#<branch-name> instead of adding a SHA-ID. So you can also use <git-url>#master to track the master branch.
– MKroehnert
Nov 2 '13 at 8:44
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Haskell: How is pronounced? [closed]
...monad: it provides pure expressions and sequencing, but no binding. (Technically, a strong lax monoidal functor.)
Hmm.
class (Functor f) => StrongLaxMonoidalFunctor f where
. . .
Not quite as catchy as Monad, I think.
What all this basically boils down to is that Applicative doesn't cor...
What underlies this JavaScript idiom: var self = this?
...s and has the potential to cause errors if you are not careful.
What you call the variable doesn't particularly matter. var that = this; is fine, but there's nothing magic about the name.
Functions declared inside a context (e.g. callbacks, closures) will have access to the variables/function dec...
C default arguments
...rargs function and manually fill in default values for arguments which the caller doesn't pass.
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How to detect user inactivity in Android
...s
private static Handler disconnectHandler = new Handler(new Handler.Callback() {
@Override
public boolean handleMessage(Message msg) {
// todo
return true;
}
});
private static Runnable disconnectCallback = new Runnable() {
@Ove...
How to quit a java app from within the program
...vention, a nonzero status code indicates abnormal termination.
This method calls the exit method in class Runtime. This method never returns normally.
The call System.exit(n) is effectively equivalent to the call:
Runtime.getRuntime().exit(n)
...
Are there inline functions in java?
...line non-final methods.
The java compilers almost never inline any method call (the JVM does all of that at runtime). They do inline compile time constants (e.g. final static primitive values). But not methods.
For more resources:
Article: The Java HotSpot Performance Engine: Method Inlining ...
How to manually trigger validation with jQuery validate?
... to execute only when element is valid
}
Note that validate() needs to be called on the form before checking it using this method.
Documentation link:
https://jqueryvalidation.org/valid/
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