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Fastest way to determine if an integer's square root is an integer
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Regular expression that matches valid IPv6 addresses
...section 2.2 of rfc5952)
link-local IPv6 addresses with zone index (section 11 of rfc4007)
IPv4-Embedded IPv6 Address (section 2 of rfc6052)
IPv4-mapped IPv6 addresses (section 2.1 of rfc2765)
IPv4-translated addresses (section 2.1 of rfc2765)
IPv6 Regular Expression:
(([0-9a-fA-F]{1,4}:){7,7}[0-...
User recognition without cookies or local storage
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12 Answers
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Find unique rows in numpy.array
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As of NumPy 1.13, one can simply choose the axis for selection of unique values in any N-dim a...
How to convert numbers between hexadecimal and decimal
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17 Answers
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List of lists changes reflected across sublists unexpectedly
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14 Answers
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Finding all possible combinations of numbers to reach a given sum
... range(len(numbers)):
n = numbers[i]
remaining = numbers[i+1:]
subset_sum(remaining, target, partial + [n])
if __name__ == "__main__":
subset_sum([3,9,8,4,5,7,10],15)
#Outputs:
#sum([3, 8, 4])=15
#sum([3, 5, 7])=15
#sum([8, 7])=15
#sum([5, 10])=15
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How to randomize (or permute) a dataframe rowwise and columnwise?
I have a dataframe (df1) like this.
8 Answers
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xtree(1796): warning C4800: “int”: 将值强制为布尔值“true”或“false...
xtree(1796): warning C4800: “int”: 将值强制为布尔值“true”或“false”(性能警告) 1>C: Program Files (x86) Microsoft Visual Studio 11.0 VC include xtree(1796): warning C4800: int: 将值强制为布尔值true或f...1>C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\inc...