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What are some (concrete) use-cases for metaclasses?

I have a friend who likes to use metaclasses, and regularly offers them as a solution. 19 Answers ...
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Can I use CASE statement in a JOIN condition?

The following image is a part of Microsoft SQL Server 2008 R2 System Views. From the image we can see that the relationship between sys.partitions and sys.allocation_units depends on the value of sys.allocation_units.type . So to join them together I would write something similar to this: ...
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What is a callback function?

What is a callback function? 21 Answers 21 ...
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What are the underlying data structures used for Redis?

I'm trying to answer two questions in a definitive list: 3 Answers 3 ...
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How to Correctly Use Lists in R?

Brief background: Many (most?) contemporary programming languages in widespread use have at least a handful of ADTs [abstract data types] in common, in particular, ...
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Java inner class and static nested class

What is the main difference between an inner class and a static nested class in Java? Does design / implementation play a role in choosing one of these? ...
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lenses, fclabels, data-accessor - which library for structure access and mutation is better

There are at least three popular libraries for accessing and manipulating fields of records. The ones I know of are: data-accessor, fclabels and lenses. ...
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Can every recursion be converted into iteration?

A reddit thread brought up an apparently interesting question: 17 Answers 17 ...
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What's the difference between assignment operator and copy constructor?

I don't understand the difference between assignment constructor and copy constructor in C++. It is like this: 8 Answers ...
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Exact difference between CharSequence and String in java [duplicate]

I read this previous post . Can any one say what the exact difference between CharSequence and String is, other than the fact that String implements CharSequence and that String is a sequence of character? For example: ...