大约有 31,100 项符合查询结果（耗时：0.0615秒） [XML]
JPA EntityManager: Why use persist() over merge()?
...gh use returned instance (managed one).
Maybe a code example will help.
MyEntity e = new MyEntity();
// scenario 1
// tran starts
em.persist(e);
e.setSomeField(someValue);
// tran ends, and the row for someField is updated in the database
// scenario 2
// tran starts
e = new MyEntity();
em.me...
Algorithm to detect intersection of two rectangles?
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My mistake, it does cope with that condition.
– Skizz
Sep 22 '08 at 22:50
2
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What are five things you hate about your favorite language? [closed]
...en a cluster of Perl-hate on Stack Overflow lately, so I thought I'd bring my " Five things you hate about your favorite language " question to Stack Overflow. Take your favorite language and tell me five things you hate about it. Those might be things that just annoy you, admitted design flaws, rec...
Is it possible for a computer to “learn” a regular expression by user-provided examples?
... better describe what is a match and what is not a desired match:
--i.e:
"My phone is +39-128-3905 , and the phone product id is 966-347Z" -> "966-347Z"
The phone number is not a product id, this may be an important proof.
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Fastest Way to Find Distance Between Two Lat/Long Points
I currently have just under a million locations in a mysql database all with longitude and latitude information.
15 Answers...
Why should a function have only one exit-point? [closed]
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My general recommendation is that return statements should, when practical, either be located before the first code that has any side-effects, or after the last code that has any side-effects. I would consider something like...
Python __call__ special method practical example
... This is an example of how it can be used, but not a good one in my opinion. There's no advantage in this case to having a callable instance. It would be better to have an interface/abstract class with a method, like .validate(); it's the same thing only more explicit. The real value of __...
Pushing an existing Git repository to SVN
I've been doing all my work in Git and pushing to GitHub. I've been very happy with both the software and the site, and I have no wish to change my working practices at this point.
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How to escape a JSON string to have it in a URL?
...there a way to encode only the characters necessary, so that I can shorten my urls ?
– Matthieu Napoli
Jul 24 '11 at 14:23
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Disable XML validation in Eclipse
My Eclipse validates XML files every time I save a file and it takes a while to validate them.
The project is created using gwt-maven-plugin.
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