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Why is Go so slow (compared to Java)?
As we could see from The Computer Language Benchmarks Game in 2010:
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Pandas count(distinct) equivalent
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Example:
In [2]: table
Out[2]:
CLIENTCODE YEARMONTH
0 1 201301
1 1 201301
2 2 201301
3 1 201302
4 2 201302
5 2 201302
6 3 201302
In [3]: table.groupby('YEARMONTH').CLIENTCODE.nunique()
Out[3...
How to delete an element from an array in C#
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Check if a given key already exists in a dictionary and increment it
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How to select a single field for all documents in a MongoDB collection?
In my MongoDB, I have a student collection with 10 records having fields name and roll . One record of this collection is:
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Explicitly select items from a list or tuple
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list( myBigList[i] for i in [87, 342, 217, 998, 500] )
I compared the answers with python ...
Aren't Python strings immutable? Then why does a + “ ” + b work?
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First a pointed to the string "Dog". Then you changed the variable a to point at a new string...
How to enable local network users to access my WAMP sites?
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