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Is there a MySQL option/feature to track history of changes to records?

I've been asked if I can keep track of the changes to the records in a MySQL database. So when a field has been changed, the old vs new is available and the date this took place. Is there a feature or common technique to do this? ...
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Remove empty strings from a list of strings

I want to remove all empty strings from a list of strings in python. 12 Answers 12 ...
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Background color of text in SVG

I want to color the background of svg text similar to background-color in css 11 Answers ...
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The new keyword “auto”; When should it be used to declare a variable type? [duplicate]

Have we (as a community) had enough experience to determine when and/or whether auto is being abused? 6 Answers ...
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List of lists into numpy array

How do I convert a simple list of lists into a numpy array? The rows are individual sublists and each row contains the elements in the sublist. ...
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How do I make Git ignore file mode (chmod) changes?

I have a project in which I have to change the mode of files with chmod to 777 while developing, but which should not change in the main repo. ...
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Understanding __get__ and __set__ and Python descriptors

I am trying to understand what Python's descriptors are and what they are useful for. I understand how they work, but here are my doubts. Consider the following code: ...
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Is there a goto statement in Java?

I'm confused about this. Most of us have been told that there isn't any goto statement in Java. 23 Answers ...
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How to detect if app is being built for device or simulator in Swift

In Objective-C we can know if an app is being built for device or simulator using macros: 20 Answers ...
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What datatype to use when storing latitude and longitude data in SQL databases? [duplicate]

When storing latitude or longitude data in an ANSI SQL compliant database, what datatype would be most appropriate? Should float be used, or decimal , or ...? ...