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What is the difference between persist() and merge() in JPA and Hibernate?
What is the difference between persist() and merge() in Hibernate?
4 Answers
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Eclipse debugger always blocks on ThreadPoolExecutor without any obvious exception, why?
I'm working on my usual projects on Eclipse, it's a J2EE application, made with Spring, Hibernate and so on. I'm using Tomcat 7 for this (no particular reason, I don't exploit any new feature, I just wanted to try that). Every time I debug my application, it happens that Eclipse debugger pops out li...
Regular expression to match DNS hostname or IP Address?
...ll. Also, only one dot is questionable issue. Would be great to have more feedback on that.
– BreakPhreak
Jan 10 '11 at 9:07
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动态追踪（Dynamic Tracing）技术漫谈 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...统也变得越来越复杂，我们知道它会分成很多很多层次，包括操作系统内核然后上面是各种系统软件，像数据库和 Web 服务器，再往上有脚本语言或者其他高级语言的虚拟机、解释器及即时（JIT）编译器，顶上则是应用层面的各...
Fastest way to remove first char in a String
...ng is "///foo" it will become "foo" instead of "//foo".
The first option needs a bit more work to understand than the third - I would view the Substring option as the most common and readable.
(Obviously each of them as an individual statement won't do anything useful - you'll need to assign the r...
How do I enable TODO/FIXME/XXX task tags in Eclipse?
.... Apparently this is something that is disabled by default because I have been using those tags for as long as I've been using Eclipse and I have never seen one of them appear in the task list. Can anyone indicate how to enable this feature? I see no preferences option anywhere that says anything to...
How to unescape HTML character entities in Java?
...eHtml4() I get <p>üè</p>. Is there a way to keep existing html tags intact?
– Nickkk
Jan 13 at 12:10
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How to detect incoming calls, in an Android device?
...roadcastReceiver {
//The receiver will be recreated whenever android feels like it. We need a static variable to remember data between instantiations
private static int lastState = TelephonyManager.CALL_STATE_IDLE;
private static Date callStartTime;
private static boolean isIncomi...
What's the purpose of git-mv?
From what I understand, Git doesn't really need to track file rename/move/copy operations, so what's the real purpose
of git mv ? The man page isn't specially descriptive...
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Google Guice vs. PicoContainer for Dependency Injection
...is researching dependency injection frameworks and is trying to decide between using Google-Guice and PicoContainer.
6 Answ...