大约有 42,000 项符合查询结果（耗时：0.0474秒） [XML]
How does JPA orphanRemoval=true differ from the ON DELETE CASCADE DML clause
...
orphanRemoval has nothing to do with ON DELETE CASCADE.
orphanRemoval is an entirely ORM-specific thing. It marks "child" entity to be removed when it's no longer referenced from the "parent" entity, e.g. when you remove the child entity from the cor...
How to show a GUI message box from a bash script in linux?
I'm writing a few little bash scripts under Ubuntu linux. I want to be able to run them from the GUI without needing a terminal window to enter any input or view any output.
...
Determine Whether Two Date Ranges Overlap
Given two date ranges, what is the simplest or most efficient way to determine whether the two date ranges overlap?
35 Answ...
VIM Disable Automatic Newline At End Of File
So I work in a PHP shop, and we all use different editors, and we all have to work on windows. I use vim, and everyone in the shop keeps complaining that whenever I edit a file there is a newline at the bottom. I've searched around and found that this is a documented behavior of vi & vim... but I w...
How can I measure the similarity between two images? [closed]
I would like to compare a screenshot of one application (could be a Web page) with a previously taken screenshot to determine whether the application is displaying itself correctly. I don't want an exact match comparison, because the aspect could be slightly different (in the case of a Web app, depe...
Can iterators be reset in Python?
Can I reset an iterator / generator in Python? I am using DictReader and would like to reset it to the beginning of the file.
...
How is an overloaded method chosen when a parameter is the literal null value?
...
Is null a String variable pointing to nothing ?
A null reference can be converted to an expression of any class type. So in the case of String, this is fine:
String x = null;
The String overload here is chosen because the Java compiler picks the most spec...
Using varchar(MAX) vs TEXT on SQL Server
I just read that the VARCHAR(MAX) datatype (which can store close to 2GB of char data) is the recommended replacement for the TEXT datatype in SQL Server 2005 and Next SQL SERVER versions.
...
What's the difference between a file descriptor and file pointer?
I want to know the difference between a file descriptor and file pointer.
9 Answers
9
...
Oracle JDBC ojdbc6 Jar as a Maven Dependency
I cannot seem to get Maven to bundle the ojdbc6.jar file into my project's war file. I have it working within the POM file when specifying a dependency directly for Hibernate tools. But it won't get bundled with the project's war file, and therefore my project won't run on Tomcat.
...