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Best design for a changelog / auditing database table? [closed]
...fied, etc). I don't need to store particularly detailed info, so I was thinking something along the lines of:
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How to find all tables that have foreign keys that reference particular table.column and have values
I have a table whose primary key is referenced in several other tables as a foreign key. For example:
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How to trigger a build only if changes happen on particular set of files
How do I tell Jenkins/Hudson to trigger a build only for changes on a particular project in my Git tree?
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XML Document to String
...mer transformer = tf.newTransformer();
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
StringWriter writer = new StringWriter();
transformer.transform(new DOMSource(doc), new StreamResult(writer));
String output = writer.getBuffer().toString().replaceAll("\n|\r", "");
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Deleting all pending tasks in celery / rabbitmq
How can I delete all pending tasks without knowing the task_id for each task?
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How to force a web browser NOT to cache images
...for events where they fill the fields (date, place, title, description, links, etc.) and save it. On that form I allow the administrator to upload an image related to the event. On the HTML page displaying the form, I am also showing a preview of the picture uploaded (HTML img tag).
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How to avoid the “divide by zero” error in SQL?
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In order to avoid a "Division by zero" error we have programmed it like this:
Select Case when divisor=0 then null
Else dividend / divisor
End ,,,
But here is a much nicer way of doing it:
Select dividend / NULLIF(divisor, 0) ...
Now the only problem is to remember the NullIf bit, if I u...
SQL Server IN vs. EXISTS Performance
...TS will be faster because once the engine has found a hit, it will quit looking as the condition has proved true.
With IN, it will collect all the results from the sub-query before further processing.
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Is Java Regex Thread Safe?
... Instances of the Matcher class are not safe for such use.
If you are looking at performance centric code, attempt to reset the Matcher instance using the reset() method, instead of creating new instances. This would reset the state of the Matcher instance, making it usable for the next regex oper...
What is the difference between loose coupling and tight coupling in the object oriented paradigm?
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