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UPDATE multiple tables in MySQL using LEFT JOIN
...ySQL does not allow using the target table in a subquery in an UPDATE statement, that's why you'll need to stick to less efficient LEFT JOIN syntax.
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Hibernate lazy-load application design
I tend to use Hibernate in combination with Spring framework and it's declarative transaction demarcation capabilities (e.g., @Transactional ).
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Sharing src/test classes between modules in a multi-module maven project
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Your Consumer project depends upon your Data project, therefore we are happy that Data must be built prior to Consumer. As a result, using the techniques suggested in the comments, I would ensure your Data project contains all the test...
how to check redis instance version?
...re I'm not even able to login to the server. Issuing the info command got me the answer. (Which, reading more carefully, wouldn't have helped OP. Still, I think most readers will find issuing info from a client more helpful than running redis-server on the host.
– cluesque
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What's the difference between “git reset” and “git checkout”?
I've always thought of git reset and git checkout as the same, in the sense that both bring the project back to a specific commit. However, I feel they can't be exactly the same, as that would be redundant. What is the actual difference between the two? I'm a bit confused, as the svn only has s...
Django - limiting query results
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Django querysets are lazy. That means a query will hit the database only when you specifically ask for the result.
So until you print or actually use the result of a query you can filter further with no database access.
As you can see below your code onl...
VIM ctrlp.vim plugin: how to rescan files?
I have come across the awesome ctrlp.vim plugin . It is a good alternative to the Command-T plugin which I have used before. What I did not like about Command-T is that it would take about 20-30 seconds to rescan files when it is invoked for the first time after starting vim.
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Copy all files with a certain extension from all subdirectories
...ine such that cp can't distinguish between the spaces separating the filenames, and the spaces within the filename. It's better to do something like
$ find . -name \*.xls -exec cp {} newDir \;
in which cp is executed for each filename that find finds, and passed the filename correctly. Here's mor...
How to loop through a HashMap in JSP?
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Just the same way as you would do in normal Java code.
for (Map.Entry<String, String> entry : countries.entrySet()) {
String key = entry.getKey();
String value = entry.getValue();
// ...
}
However, scriptlets (raw Ja...
Function to return only alpha-numeric characters from string?
...ersion of it by stripping away all special characters leaving only alpha-numeric.
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