大约有 40,000 项符合查询结果（耗时：0.0691秒） [XML]
What is a raw type and why shouldn't we use it?
...ines a raw type as follows:
JLS 4.8 Raw Types
A raw type is defined to be one of:
The reference type that is formed by taking the name of a generic type declaration without an accompanying type argument list.
An array type whose element type is a raw type.
A non-static member type of a raw type ...
Hidden features of Perl?
...cumented somewhere, or follow logically from the documented features, but nonetheless some are not very well known.
Update: Another nice one. Below the q{...} quoting constructs were mentioned, but did you know that you can use letters as delimiters?
$ perl -Mstrict -wle 'print q bJet another per...
REDHAT 6.4 X64下ORACLE 11GR2静默安装 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...-------------------------
# Specify the installation option.
# It can be one of the following:
# - INSTALL_DB_SWONLY 仅安装DB数据库软件
# - INSTALL_DB_AND_CONFIG 装DB数据库软件和配置库
# - UPGRADE_DB 升级DB数据库软件
#----------------------------------...
Why should I use the keyword “final” on a method parameter in Java?
...other than the object passed by the calling method. In the examples above, one should never write the line arg =. Since humans make mistakes, and programmers are human, let’s ask the compiler to assist us. Mark every parameter/argument variable as 'final' so that the compiler may find and flag any...
round up to 2 decimal places in java? [duplicate]
I have read a lot of stackoverflow questions but none seems to be working for me. i am using math.round() to round off.
this is the code:
...
Validation of radio button group using jQuery validation plugin
How to perform validation for a radio button group (one radio button should be selected) using jQuery validation plugin?
8 ...
Difference between FetchType LAZY and EAGER in Java Persistence API?
...te String id;
private String name;
private String address;
@OneToMany(fetch = FetchType.EAGER)
private List<Student> students;
// etc.
}
And here's an example where students is explicitly marked to be loaded lazily:
@Entity
public class University {
@Id
...
What is the difference between ManualResetEvent and AutoResetEvent in .NET?
...rstand. An AutoResetEvent resets when the code passes through event.WaitOne() , but a ManualResetEvent does not.
11 An...
Can I have multiple Xcode versions installed?
Is it possible to have more than one version of Xcode installed at the same time?
12 Answers
...
EF Code First foreign key without navigation property
...
With EF Code First Fluent API it is impossible. You always need at least one navigation property to create a foreign key constraint in the database.
If you are using Code First Migrations you have the option to add a new code based migration on the package manager console (add-migration SomeNewSc...