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How to avoid mysql 'Deadlock found when trying to get lock; try restarting transaction'
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One easy trick that can help with most deadlocks is sorting the operations in a specific order.
You get a deadlock when two transactions are trying to lock two locks at opposite orders, ie:
connection 1: locks key(1), locks ...
How to avoid type safety warnings with Hibernate HQL results?
...est:
Write a cast-helper
Simply refactor all your @SuppressWarnings into one place:
List<Cat> cats = MyHibernateUtils.listAndCast(q);
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public static <T> List<T> listAndCast(Query q) {
@SuppressWarnings("unchecked")
List list = q.list();
return list;
}
Prevent ...
What are unit tests, integration tests, smoke tests, and regression tests?
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Unit test: Specify and test one point of the contract of single method of a class. This should have a very narrow and well defined scope. Complex dependencies and interactions to the outside world are stubbed or mocked.
Integration test: Test the correc...
XPath OR operator for different nodes
...//cd" means among all child nodes and descendant of the root node find all ones named 'book' then find also all named 'cd'. If in the descendance of the root node there are only book nodes,your node-set will contain book nodes only. If in the descendance of the root node there are only cd nodes,yo...
C# Entity-Framework: How can I combine a .Find and .Include on a Model Object?
... (SingleOrDefault), ToList will retrieve all entries first and then select one
– Sander Rijken
Sep 8 '11 at 13:51
5
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Regex (grep) for multi-line search needed [duplicate]
...character. That is, grep knows where end of line is, but sees the input as one big line.
-o print only matching. Because we're using -z, the whole file is like a single big line, so if there is a match, the entire file would be printed; this way it won't do that.
In regexp:
(?s) activate PCRE_DOT...
CFBundleVersion in the Info.plist Upload Error
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+1 Helpful one. I used 1.02 for my previous version. And, fix it using this answer. Thank you.
– Praveenkumar
Apr 8 '13 at 11:43
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Naming conventions: “State” versus “Status” [closed]
... FooStatus". Is there a convention discussed out there? Should we only use one? If so which one, and if not, how should we choose?
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How do I use arrays in C++?
...rywhere. C++ provides abstractions that are easier to use and less error-prone ( std::vector<T> since C++98 and std::array<T, n> since C++11 ), so the need for arrays does not arise quite as often as it does in C. However, when you read legacy code or interact with a library written ...
jQuery first child of “this”
...the children() function, which is very similar to find() but only searches one level deep in the hierarchy (which is all you need...):
element.children(":first").toggleClass("redClass");
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