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C#对象序列化与反序列化 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ement("姓名")]
public string Name;
[XmlElement("年龄")]
public int Age;
public PersonB() { }//必须提供无参构造器，否则XmlSerializer将出错
}
[XmlType("人员信息")]
public class PersonArray
{
[XmlArrayItem(typeof(PersonA)), XmlArrayItem(typeof(PersonB))]
pub...
Java 8: Where is TriFunction (and kin) in java.util.function? Or what is the alternative?
...not in the way you may think now.
For example, the function
Function<Integer,Integer> f = (x,y) -> x + y
is a constructive one.
As you need to construct something. In the example
you constructed the tuple (x,y). Constructive functions have the problem,
of being not able to handle i...
Why is “final” not allowed in Java 8 interface methods?
One of the most useful features of Java 8 are the new default methods on interfaces. There are essentially two reasons (there may be others) why they have been introduced:
...
Efficiency of Java “Double Brace Initialization”?
... copious amounts of anonymous inner classes -- each class will be compiled into a separate class file.
The "double brace initialization", as already mentioned, is an anonymous inner class with an instance initialization block, which means that a new class is created for each "initialization", all f...
C#对象序列化与反序列化 - 更多技术 - 清泛网移动版 - 专注C/C++及内核技术
...ement("姓名")]
public string Name;
[XmlElement("年龄")]
public int Age;
public PersonB() { }//必须提供无参构造器，否则XmlSerializer将出错
}
[XmlType("人员信息")]
public class PersonArray
{
[XmlArrayItem(typeof(PersonA)), XmlArrayItem(typeof(PersonB))]
pub...
MySQL order by before group by
...
If you have the following sample data:
CREATE TABLE wp_posts
(`id` int, `title` varchar(6), `post_date` datetime, `post_author` varchar(3))
;
INSERT INTO wp_posts
(`id`, `title`, `post_date`, `post_author`)
VALUES
(1, 'Title1', '2013-01-01 00:00:00', 'Jim'),
(2, 'Title2', '2013-...
Do sealed classes really offer performance Benefits?
...
the 'rambling' link is interesting in that it sounds like technical goodness but is in fact nonsense. Read the comments on the article for more info. Summary: the 3 reasons given are Versioning, Performance, and Security/Predictability - [see next ...
What is the difference between user and kernel modes in operating systems?
...tch from user mode to kernel mode is not done automatically by CPU. CPU is interrupted by interrupts (timers, keyboard, I/O). When interrupt occurs, CPU stops executing the current running program, switch to kernel mode, executes interrupt handler. This handler saves the state of CPU, performs its o...
Why should I avoid using Properties in C#?
...cheap to execute etc.
Personally I disagree with him on this particular point - I find properties make the client code much simpler to read than the equivalent method calls. I agree that developers need to know that properties are basically methods in disguise - but I think that educating developer...
How to create GUID / UUID?
... code for production environments are encouraged to use a rigorous, well-maintained implementation such as the uuid module.
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