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LINQ Aggregate algorithm explained
This might sound lame, but I have not been able to find a really good explanation of Aggregate .
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How to convert an integer to a string in any base?
Python allows easy creation of an integer from a string of a given base via
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How can I join elements of an array in Bash?
If I have an array like this in Bash:
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Apply multiple functions to multiple groupby columns
The docs show how to apply multiple functions on a groupby object at a time using a dict with the output column names as the keys:
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Combine the first two commits of a Git repository?
Suppose you have a history containing the three commits A, B and C :
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Relationship between SciPy and NumPy
SciPy appears to provide most (but not all [1]) of NumPy's functions in its own namespace. In other words, if there's a function named numpy.foo , there's almost certainly a scipy.foo . Most of the time, the two appear to be exactly the same, oftentimes even pointing to the same function object.
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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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What's the difference between array_merge and array + array?
A fairly simple question. What's the difference between:
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What is an undefined reference/unresolved external symbol error and how do I fix it?
What are undefined reference/unresolved external symbol errors? What are common causes and how to fix/prevent them?
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Convert columns to string in Pandas
I have the following DataFrame from a SQL query:
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