大约有 42,000 项符合查询结果（耗时：0.0385秒） [XML]
How can I make a JPA OneToOne relation lazy
...
As I explained in this article, unless you are using Bytecode Enhancement, you cannot fetch lazily the parent-side @OneToOne association.
However, most often, you don't even need the parent-side association if you use @MapsId on the client side:
@Entity(name = "PostDetails")
@Table(na...
Does using final for variables in Java improve garbage collection?
...also use local variables instead of fields when it is possible in order to enhance memory garbage collection and to reduce referential ties.
– sivi
Mar 10 '14 at 9:21
...
When should you use 'friend' in C++?
...
As an extra note, the C++ FAQ mentions that friend enhances encapsulation. friend grants selective access to members, just like protected does. Any fine-grained control is better than granting public access. Other languages define selective access mechanisms too, consider C#'...
Understanding “randomness”
... @Trufa just trust rand() to actually be random, and don't try to 'enhance' it's randomness. Don't set the seed multiple times. Any individual seed is perfectly fine, as long as it's semi-random itself. Lots of implementations I've seen use the UNIX epoch as the seed, which changes every sec...
How do I rename a column in a SQLite database table?
...
This was just fixed with 2018-09-15 (3.25.0)
Enhancements the ALTER TABLE command:
Add support for renaming columns within a table using ALTER TABLE table RENAME COLUMN oldname TO newname.
Fix table rename feature so that it also updates references to the rena...
Java switch statement multiple cases
...unctional language and that isn't a bad thing.
I will post any updates or enhancements to this Gist on Github.
share
|
improve this answer
|
follow
|
...
JUnit 4 Test Suites
...estSuite over the annotation and you can take advantage of all the JUnit 4 enhancements if you use the organizationally equivalent annotation.
– Thunderforge
Dec 18 '13 at 3:26
...
Comparator.reversed() does not compile using lambda
...t; u.getName()).reversed());
It might be possible for the compiler to be enhanced to cover this case in a future release.
share
|
improve this answer
|
follow
...
PermGen elimination in JDK 8
...
This is one of the new features of Java 8, part of JDK Enhancement Proposals 122:
Remove the permanent generation from the Hotspot JVM and thus the need to tune the size of the permanent generation.
The list of all the JEPs that will be included in Java 8 can be found on th...
MySQL主从服务器数据一致性的核对与修复 - 数据库(内核) - 清泛网 - 专注C/...
...问题。它们的安装很简单，可以依照自己的操作系统选择下载rpm或者deb软件包来安装，当然也可以使用源代码来安装，不过要注意的是，必须确保系统已经安装了依赖的Perl软件包：
shell> perl -MCPAN -e 'install DBI'
shell> perl -MCPAN -e...