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Fast way of counting non-zero bits in positive integer
...n generate it at runtime:
counts = bytes(bin(x).count("1") for x in range(256)) # py2: use bytearray
Or just define it literally:
counts = (b'\x00\x01\x01\x02\x01\x02\x02\x03\x01\x02\x02\x03\x02\x03\x03\x04'
b'\x01\x02\x02\x03\x02\x03\x03\x04\x02\x03\x03\x04\x03\x04\x04\x05'
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Filter dataframe rows if value in column is in a set list of values [duplicate]
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edited Feb 25 at 0:45
Harvey
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answe...
How to calculate age (in years) based on Date of Birth and getDate()
... table listing people along with their date of birth (currently a nvarchar(25))
34 Answers
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How to sort an array of integers correctly
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25 Answers
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Pandas convert dataframe to array of tuples
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Wes McKinneyWes McKinney
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Selecting data frame rows based on partial string match in a column
... Qn1 Quebec nonchilled 175 30.4
3 Qn1 Quebec nonchilled 250 34.8
4 Qn1 Quebec nonchilled 350 37.2
5 Qn1 Quebec nonchilled 500 35.3
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This filters the sample CO2 data set (that comes with R) for rows where the Treatment variable contains the substring "n...
Get time in milliseconds using C#
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answered Oct 25 '10 at 16:05
RedFilterRedFilter
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SVN encrypted password store
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answered Jan 25 '13 at 6:20
bsbbsb
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Convert varchar to uniqueidentifier in SQL Server
...iQuassnoi
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What is more efficient? Using pow to square or just multiply it with itself?
...lt; "\n";
}
Results are:
1 00:00:01.126008 00:00:01.128338
2 00:00:01.125832 00:00:01.127227
3 00:00:01.125563 00:00:01.126590
4 00:00:01.126289 00:00:01.126086
5 00:00:01.126570 00:00:01.125930
2.45829e+54
Note that I accumulate the result of every pow calculation to make sure the compile...