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Multiple aggregations of the same column using pandas GroupBy.agg()
Is there a pandas built-in way to apply two different aggregating functions f1, f2 to the same column df["returns"] , without having to call agg() multiple times?
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Which parts of Real World Haskell are now obsolete or considered bad practice?
In the chapter 19 of Real World Haskell a lot of the examples now fail due to the change of Control.Exception .
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Can you help me understand Moq Callback?
Using Moq and looked at Callback but I have not been able to find a simple example to understand how to use it.
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Why do I need Transaction in Hibernate for read-only operations?
Why do I need Transaction in Hibernate for read-only operations?
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I want to get the type of a variable at runtime
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Why Func instead of Predicate?
This is just a curiosity question I was wondering if anyone had a good answer to:
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What are fixtures in programming?
I have heard of this term many times (in the context of programming) but couldn't find any explanation of what it meant. Any good articles or explanations?
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bash HISTSIZE vs. HISTFILESIZE?
What is the difference in HISTSIZE vs. HISTFILESIZE ?
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What is the difference between mocking and spying when using Mockito?
What would be a use case for a use of a Mockito spy?
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MongoDB/NoSQL: Keeping Document Change History
A fairly common requirement in database applications is to track changes to one or more specific entities in a database. I've heard this called row versioning, a log table or a history table (I'm sure there are other names for it). There are a number of ways to approach it in an RDBMS--you can wri...