大约有 3,500 项符合查询结果（耗时：0.0158秒） [XML]
When would you use delegates in C#? [closed]
... this signature can be used to instantiate a delegate of this type. In C# 2.0, this can be done implicitly, simply by using method's name, as well as by using anonymous methods.
This method uses the type as a parameter. Note the delegate's invocation.
public class DataProvider
{
protected st...
Upgrading PHP in XAMPP for Windows?
...es Apache version 2.2 and the files with the 2 prefix are built for Apache 2.0, so you must take the files build for the newer version (which has a different plugin interface) and rename them in the filenames XAMPP expects.
NOTE: there are two directories to be updated with new version of files, na...
Unit testing private methods in C#
...t and PrivateType classes are unavailable for projects targeting .NET Core 2.0 - There's a github issue for this: github.com/Microsoft/testfx/issues/366
– shiitake
Apr 12 '18 at 20:06
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UIButton title text color
...n.setTitleColor(UIColor(displayP3Red: 0.0/255.0, green: 180.0/255.0, blue: 2.0/255.0, alpha: 1.0), for: .normal)
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Difference between @OneToMany and @ElementCollection?
...ngWrapper {
@Id
private int id;
private String string;
}
With JPA 2.0 you can simply write:
@ElementCollection
private Collection<String> strings;
Simpler, isn't it? Note that you can still control the table and column names using @CollectionTable annotation.
See also:
Java Pers...
How does JPA orphanRemoval=true differ from the ON DELETE CASCADE DML clause
I am a little confused about the JPA 2.0 orphanRemoval attribute.
8 Answers
8
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How efficient is locking an unlocked mutex? What is the cost of a mutex?
...ens often, then multiple locks would increase parallelism. At the cost of maintainability, since more locking means more debugging of the locking.
How efficient is it to lock a mutex? I.e. how much assembler instructions are there likely and how much time do they take (in the case that the mutex...
Convert generic List/Enumerable to DataTable?
...one; reflection would suffice - or if you need quicker, HyperDescriptor in 2.0, or maybe Expression in 3.5. Actually, HyperDescriptor should be more than adequate.
For example:
// remove "this" if not on C# 3.0 / .NET 3.5
public static DataTable ToDataTable<T>(this IList<T> data)
{
P...
Netty vs Apache MINA
...n Netty. I have used MINA in the past, but find their documentation of the 2.0 stuff has big holes, and the breaking of API backward compatibility a big minus.
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How to hide databases that I am not allowed to access
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The latest version of pgAdmin 4 (2.0) has the DB restriction property too in the "Advanced" tab of the server connection property, much the same as in pgAdmin 3. No quotes needed.
sh...